A Monograph on the Sub-class Cirripedia (Volume 1 of 2) / The Lepadidae; Or, Pedunculated Cirripedes

by Charles Darwin

[27.] [Pollicipes polymerus]; a segment of the sixth cirrus, showing the arrangement of the spines; (a), main anterior spines, of which there is a corresponding row on the opposite side; (b b), calcareous shields on the dorsal surfaces, with tufts of fine spines near their upper edges.

[28.] [Alepas cornuta]; sixth cirrus of; (a) basal portion of one ramus, consisting of numerous segments; (k), the other and almost rudimentary ramus.

[29.] Pœcilasma fissa; segments of the sixth cirrus, showing the arrangement of the spines; (a), anterior spines; (c), dorsal tufts.

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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].