INDEX.

Synonyms and doubtful species are printed in italics.

Abortion, extreme, in the male of Ibla, [202.]
Absia, [332.]
Acari, development of, [18].
Acoustic (?) organs, general description of, [53].
Adductor scutorum muscle, [39].
Affinities of the Lepadidæ, [64].
Alepas, Genus, [156].
- cornuta, [165].
- minuta, [160].
- parasita, [163].
- squalicola, [170].
- tubulosa, [169].
Allman, Professor, on Cyclops, [38].
Anatifa vel Anatifera, Genus, [67], [99], [215].
- crassa, [107].
- dentata, [73].
- elongata, [374].
- engonata, [73].
- hirsuta, [203].
- lævis, [73], [77].
- oceanica, [92].
- obliqua, [264].
- parasita, [163].
- quadrivalvis, [203].
- sessilis, [81].
- spinosa, [324].
- striata, [81], [86].
- substriata, [77].
- sulcata, [86].
- tricolor, [77].
- truncata, [361].
- univalvis, [163].
- villosa, [367].
- vitrea, [92].
Anelasma, Genus, [169].
Antennæ, larval, [33].
- in the Lepadidæ, table of measurements, [286].
- of Ibla Cumingii, [191].
- of Lepas australis, [15].
- of Scalpellum vulgare, [237].
Appendages, caudal, [43].
- in larva, [19].
- filamentary, [38].
Asplanchna, male of, [292].
Attachment of Cirripedes, [33].
- of Scalpellum vulgare, [226].
- of Pollicipes polymerus, [310].

Balanidæ, affinities of, [64].
Bate, Mr. C. S., on the metamorphoses of Cirripedes, [9-16].
Bopyrus, parasite allied to, [55].
Branta, [137].
- aurita, [141].
- virgatum, [146].
Brightwell, Mr., on the Asplanchna, [292].
Brisnæus, [332].
- Rhodiopus, [363].
Brugière, date of work of, [67].
Buoyancy, means of, in Lepas fascicularis, [95].
Burmeister, Professor, on the metamorphoses of Cirripedes, [9], [13].
Burrowing powers of, in Lithotrya, [337].

Calentica, [215].
- Homii, [274].
Capitulum, general description of, [28].
Capitulum, Genus, [293].
- mitella, [316].
Carapace of the larva, [15].
Caudal appendages, [43].
- in larva, [19].
Cement-discs,
- in a straight row, in Scalpellum vulgare, [226].
- in Pollicipes polymerus, [310].
Cement-ducts, [34].
- in the larva, [20].
Cement-glands, incipient in larva, [24], [34].
Cement, nature of, [36].
Cement-tissue, modified as a float in Lepas fascicularis, [95].
Chitine, chemical nature of, [30].
Chthamalinæ, [2], [65].
Cineras, Genus, [137], [156].
- bicolor, [146].
- Cranchii, [146].
- chelonophilus, [146], [151].
- megalepas, [146].
- membranacea, [146].
- Montagui, [146].
- Olfersii, [146], [152].
- Rissoanus, [146].
- vittatus, [146].
Circulation, [46].
Cirri, general description of, [42].
- of young Cirripede, [22].
Cirripede, immature whilst within the larva, [20].
Cirripedes, sessile, affinities of, [64].
- sub-families of, [2].
- useful as food, [66].
Clyptra, [374].
Coates, Dr., on Lepas fascicularis, [96].
Conchoderma, Genus, [136].
- aurita, [141].
- Hunteri, [153].
- leporinum, [141].
- virgata, [146].
Conchotrya, [332].
- Valentiana, [371].
Cuming, Mr., obligations to, [181], [189].
- on the Cirripedes of the Philippine Archipelago, [65].
- on Balanus psittacus, [66].
Cup, basal calcareous, in Lithotrya, [338].

Dana, Mr. J. D., on the ovaria in certain Crustacea, [26].
- on the antennæ of larval Cirripedes, [15], [26].
Dichelaspis, Genus, [115].
- Grayii, [123].
- Lowei, [128].
- orthogonia, [130].
- pellucida, [125].
- Warwickii, [120].
Distribution, geographical, [65].
Dosima, [67].
- fascicularis, [92].
Dujardin, on the larvæ of Acari, [18].

Encyclopédie Method., date of, [67]
Entozoons, sexes of, [201].
Epidermis of valves, [31].
Exuviation, [61], [63].
- of the larval eyes, [24].
- of the larval integuments, [20].
- of the membrane of peduncle in Lithotrya, [336].
Eyes, in the Lepadidæ, [49].
- of the larva, first stage, [10].
- last stage, [16], [24].

Families of Cirripedes, [2].
Farre, Dr., on the acoustic organs in Crustacea, [54].
Female organs of generation in the Lepadidæ, [56].
Filaments, [38].
Forbes, Prof. E., on the homology of the peduncle, [26].
Fræna, ovigerous, [59].

Ganglia, ophthalmic, [49].
Generation, organs of, in the Lepadidæ, [55].
Glands, supposed salivary, [57].
- on the ovigerous lamellæ, [60].
Goodsir, Mr., on the metamorphosis of Cirripedes, [9], [16].
- on the supposed male of Balanus, [55].
Gray, Mr. J. E., on the genus Dosima, [99].
- on the metamorphosis of Cirripedes, [9].
- on the inequality of the valves in Pæcilasma, [101], [103].
- on an unknown 7-valved Lepas, [374].
- on the genus Scalpellum, [216].
Growth, rate of, [63].
Gymnolepas, [137].
- Cranchii, [146].
- Cuvierii, [141].

Habitats, [65].
Hancock, Mr., on the burrowing of Cirripedes, [346].
- on the larva of Lepas, [11].
Hectocotyle, [200].
Heptalasmis, [115].
Hermaphroditism, peculiar kind of, [201].
Heteroura androphora, [201].
Homologies of the Cirripedia, [25]-28.

Ibla, Genus, [180].
- Cumingii (female), [183].
  - (male), [189].
- Cuvieriana, [203].
- quadrivalvis (hermaphrodite), [203].
  - (complemental male), [207].
- general summary on its sexual relations, [281].
Impregnation of the females and hermaphrodites in Ibla and Scalpellum, [290].

King, Captain, on a new Scalpellum, [375].
Kölliker, on the males of Cephalopoda, [200].

Labrum, general description of, [40].
Lamellæ, ovigerous, [58].
Larvæ, general description of, [8].
Larva of Ibla quadrivalvis, [210].
Leidy, Professor, on the eyes of Cirripedes, [2], [49].
Lepas, Genus, [67].
- anatifera, [73].
- anserifera, [81], [86].
- australis, [89].
- australis, metamorphosis of, [14].
- coriacea, [146].
- cornuta, [141].
- cygnea, [92].
- dilata, [92].
- dorsalis, [351].
- fascicularis, [92].
- fascicularis, peduncle, remarkable structure of, [95].
- Gallorum, [298].
- Hillii, [77].
- leporina, [141].
- membranacea, [146].
- mitella, [316].
- muricata, [85].
- nauta, [81].
- pectinata, [85].
- pollicipes, [298].
- scalpellum, [222].
- sulcata, [86].
- virgata, [146].
Lerneidæ, males of, [200].
Leucifer, [28].
Litholepas, [332].
- de Mont Serrat, [351].
Lithotrya, Genus, [332].
- cauta, [356].
- dorsalis, [351].
- Nicobarica, [354].
- Rhodiopus, [363].
- truncata, [366].
- Valentiana, [371].
- powers of burrowing, [337].
Lovèn, Dr., on the habits of the Alepas squalicola, [178].
- on the homologies of Cirripedes, [26].
Lowe, Rev. R. T., on the fishes of Madeira and Japan, [106].
- on the Cirripedes of Madeira, [65].

Macgillivray, Prof., on Conchoderma, [140].
- on Lepas anserifera, [81].
Malacotta, [137].
- bivalvis, [141].
Male Cirripedes, discussion on, [281].
- of Ibla Cumingii, [189].
  - ” quadrivalvis, [207].
- of Scalpellum ornatum, [248].
  - Peronii, [270].
  - rostratum, [262].
  - villosum, [278].
  - vulgare, [231].
- organs of generation in the Lepadidæ, [55].
Mandibles, general description of, [41].
Martin St. Ange, on the affinities of Cirripedes, [1].
- on a closed tube within the stomach, [45].
- on the generative organs, [55].
Maxillæ, general description of, [41].
Membrane covering valves, [30].
Metamorphoses, first stage, [9].
- second stage, [13].
- last stage, [14].
Mitella, Genus, [293].
Mouth, general description of, [39].
- of young Cirripede, [22].
- of the larva, first stage, [11].
  - last stage, [17].
Muscles, [39].
- without striæ in Anelasma, and in embryonic Cirripedes, [172].

Nerves, general system of, [46].
- of Ibla Cumingii, [188].
Nomenclature of the parts of Cirripedes, [3].
- Rules of, [293].

Octolasmis, [115].
- Warwickii, [120].
Œsophagus, general description of, [44].
Orders of Cirripedes, [2].
Organs acoustic (?) general description of, [53].
- of the larva of Lepas, [15].
- female, of generation, in the Lepadidæ, [56].
- male, of generation, in the Lepadidæ, [55].
- olfactory, general description of, [52].
Otion, [137].
- auritus, [141].
- Bellianus, [141].
- Blainvillianus, [141].
- Cuvieranus, [141].
- depressa, [141].
- Dumerillianus, [141].
- Rissoanus, [141].
- saccutifera, [141].
Ova, [58].
Ovaria, incipient in the larva, [20], [24].
- in the Lepadidæ, [57].
Oviducts (supposed), [59].
Owen, Professor, on certain Entozoic Worms, [201].
- on the Conchoderma Hunteri, [154].
Oxynaspis, Genus, [133].
- celata, [134].

Pamina, [137].
- trilineata, [146].
Peach, Mr., obligations to, [240].
- on the movements of pedunculated Cirripedes, [33].
Peduncle, general description of, [31].
- origin and homologies of, [21].
Penis, general description of, [56].
- of Ibla quadrivalvis, [206].
Pentalasmis, vel Pentalepas, [67].
- anseriferus, [81].
- dentatus, [73].
- dilatata, [81].
- Donovani, [92].
- fascicularis, [92].
- Hillii, [77].
- inversus, [86].
- lævis, [73], [77].
- radula, [86].
- spirulæ, [86].
- spirulicola, [92].
- sulcata, [86].
Pentalepas vitrea, [92].
Pœcilasma, Genus, [99].
- aurantia, [105].
- crassa, [107].
- eburnea, [112].
- fissa, [109].
- Kæmpferi, [102].
Pollicipes, [293].
- cornucopia, [298].
- elegans, [304].
- mitella, [316].
- Mortoni, [307].
- obliqua, [264].
- polymerus, [307].
- ruber, [304].
- scalpellum, [222].
- sertus, [327].
- sinensis, [375].
- Smythii, [298].
- spinosus, [324].
- tomentosus, [274].
- villosus, [274].
Polylepas, [215], [293].
- mitella, [316].
- sinensis, [375].
- vulgare, [222].
Primordial valves, [22].
Prosoma, shape of, [39].
Proteolepas, [3], [26].
Pupa, locomotive or last larval state, in Cirripedes, [18].

Ramphidiona, [293].
Range, geographical, [65].
Rate of growth, [63].
Reinhardt on the burrowing of Lithotrya, [346].
Reproduction, organs of, in the Lepadidæ, [55].
Rotifera, sexes of, [292].
Rules of nomenclature, [293].

Sack, description of, [31].
- origin of, [15], [23].
Scalpellum, genus, [215].
- lævis, [376].
- læve, [222].
- Sicilice, [222].
- ornatum, (female,) 244.
  - (male,) 248.
- papillosum, [375].
- Peronii, [264].
  - (male,) 270.
- rostratum, [259].
  - (male,) 262.
- rutilum, [253].
  - (male,) 258.
- villosum, [274].
  - (male,) 278.
- vulgare, [222].
  - larva of, [9].
  - (complemental male,) [231].
- general summary on sexual relations, [281].
Schmidt, Dr., on chitine, [30].
- on the muscles in young crustacea, [172].
Senoclita, [137].
- fasciata, [146].
Sexes, discussion on, in Ibla and Scalpellum, [281].
Siebold, Dr. C. Von, [201].
Smilium, [215].
- Peronii, [264].
Spermatozoa in Scalpellum vulgare, [236].
Sprengel, Ch. K., on compositous flowers, [203].
Steenstrup, Prof., on the homology of the peduncle, [26].
- on the non-hermaphroditism of Cirripedes, [55].
Stomach of larva, [19].
- general description of, [44].
Stroem on a seven-valved Lepas, [374].
Syngamus trachealis, [201].

Testes in the Lepadidæ, [55].
Tetralasmis, [180].
- hirsutus, [203].
Thaliella, [215].
- ornata, [244].
Thompson, Mr. W., on Lepas anatifera, (var.) [74].
- on the exuviations of sessile Cirripedes, [63].
- obligations to, [240].
- Mr. Vaughan, on the metamorphoses of Cirripedes, [9], [10].
Trilasmis, genus, [99].
- eburnea, [112].
Triton, genus, [156].
- fasciculatus, [163].

Upopi, or young acari, [18].

Vesiculæ seminales, [56].
Valves, general description of, [28].
Valves, chemical nature of, [30].
- horny, colour changed by pressure, [184].
- primordial, [22].