Table of Contents.

Page
Dedication[v]
Preface[vii]
Monograph on the Cirripedia[1]
Introduction[1]
On the Names given to the different parts of Cirripedes[3]
Class Crustacea, Sub-Class Cirripedia[9]
On the Sexual Relation of Cirripedes[23]
Order I.—Thoracica[30]
Family Balanidæ[33]
Table of Contents[33]
Structure of Shell[34]
Structure of the Individual Compartments[43]
Structure of the Radii[45]
Structure of the Alæ[47]
Structure of the Sheath[48]
Structure of the Basis[49]
Structure of the Opercular Valves (Scuta and Terga)[51]
Growth of the Whole Shell, and Its Microscopical Structure[54]
Muscles of Sack[61]
Branchiæ[63]
Thorax and Body[65]
Muscular System[68]
Movements and Muscles of the Cirri[71]
Mouth[74]
Cirri[81]
Caudal Appendages[85]
Alimentary Canal[85]
Circulatory System[87]
Nervous System[88]
Eyes and Vision[93]
Acoustic Organs[95]
Olfactory Sacks[97]
Male Organs of Generation[97]
Female Organs of Generation[100]
Metamorphoses and Homologies[102]
Larva, First Stage[103]
Larva, Second Stage[109]
Larva in the Last or Pupal Stage[110]
Act of Metamorphosis[126]
On the Homologies of the Carapace and Shelly Valves[131]
Cementing Apparatus[133]
Affinities, Classification, Variation[152]
Rate of Growth, Exuviation, Powers of Repairing Injuries[156]
Geographical Range and Habits[159]
Geological History[172]
Sub-Family Balaninæ[175]
1. Genus Balanus[177]
Sections of the Genus[193]
Section A[194]
1. Balanus tintinnabulum[194]
Var. communis, vesiculosus, validus, zebra, crispatus, spinosus, coccopoma, concinnus, intermedius, occator, d’Orbignii
Varieties[201]
2. Balanus tulipiformis[204]
3. Balanus psittacus[206]
4. Balanus Capensis[209]
5. Balanus Nigrescens[210]
6. Balanus decorus[212]
7. Balanus vinaceus[213]
8. Balanus Ajax[214]
Section B[216]
9. Balanus stultus[216]
10. Balanus calceolus[218]
11. Balanus galeatus[220]
12. Balanus cymbiformis[221]
13. Balanus navicula[221]
Section C[223]
14. Balanus trigonus[223]
15. Balanus spongicola[225]
16. Balanus lævis[227]
Var. nitidus, Coquimbensis
17. Balanus perforatus[231]
Var. angustus, Cranchii, fistulosus, mirabilis
18. Balanus concavus[235]
19. Balanus amphitrite[240]
Var. communis, venustus, pallidus, niveus, modestus, Stutsburi, obscurus, variegatus, cirratus
Varieties[245]
20. Balanus pœcilus[245]
21. Balanus eburneus[248]
22. Balanus improvisus[250]
Var. assimilis
23. Balanus nubilus[253]
24. Balanus corrugatus[254]
Section D[256]
25. Balanus porcatus[256]
26. Balanus patellaris[259]
27. Balanus crenatus[261]
28. Balanus glandula[265]
Section E[267]
29. Balanus balanoides[267]
Varieties[270]
30. Balanus cariosus[273]
31. Balanus declivis[275]
Section F[277]
32. Balanus Hameri[277]
33. Balanus amaryllis[279]
34. Balanus allium[281]
35. Balanus cepa[283]
36. Balanus quadrivittatus[284]
37. Balanus terebratus[285]
38. Balanus vestitus[286]
39. Balanus Imperator[288]
40. Balanus flosculus[290]
Var. sordidus
41. Balanus bisulcatus[293]
Var. plicatus
42. Balanus dolosus[295]
43. Balanus unguiformis[296]
Var. erisma
44. Balanus varians[298]
45. Balanus inclusus[299]
2. Sub-Genus Acasta[302]
1. Acasta spongites[308]
2. Acasta sulcata[310]
3. Acasta cyathus[312]
4. Acasta undulata[313]
5. Acasta glans[314]
6. Acasta lævigata[315]
7. Acasta fenestrata[316]
8. Acasta purpurata[318]
9. Acasta sporillus[319]
3. Genus Tetraclita[321]
1. Tetraclita porosa[329]
Var. communis, nigrescens, viridis, rubescens, elegans, communis (young), patellaris
2. Tetraclita serrata[334]
3. Tetraclita rosea[335]
4. Tetraclita purpurascens[337]
5. Tetraclita costata[339]
6. Tetraclita vitiata[340]
7. Tetraclita cœrulescens[342]
8. Tetraclita radiata[343]
4. Genus Elminius[345]
1. Elminius Kingii[348]
2. Elminius modestus[350]
3. Elminius plicatus[351]
4. Elminius simplex[353]
5. Genus Pyrgoma[355]
1. Pyrgoma anglicum[360]
2. Pyrgoma Stokesii[361]
3. Pyrgoma cancellatum[362]
4. Pyrgoma conjugatum[364]
5. Pyrgoma grande[365]
6. Pyrgoma milleporæ[367]
7. Pyrgoma dentatum[369]
8. Pyrgoma crenatum[370]
9. Pyrgoma monticulariæ[372]
Species dubiæ[374]
6. Sub-Genus Creusia[375]
1. Creusia spinulosa[376]
Varieties with the Scuta and Terga calcified together[380]
7. Genus Chelonobia[382]
1. Chelonobia testudinaria[392]
2. Chelonobia caretta[394]
3. Chelonobia patula[396]
Second Section of the Sub-Family of Balaninæ[397]
8. Genus Coronula[397]
1. Coronula balænaris[415]
2. Coronula diadema[417]
3. Coronula reginæ[419]
4. Coronula barbara[421]
Species Dubiæ[423]
9. Genus Platylepas[424]
1. Platylepas bissexlobata[428]
2. Platylepas decorata[429]
Species Dubiæ[430]
10. Genus Tubicinella[430]
1. Tubicinella trachealis[431]
11. Genus Xenobalanus[438]
1. Xenobalanus globicipitis[440]
Sub-Family Chthamalinæ[446]
12. Genus Chthamalus[447]
1. Chthamalus stellatus[455]
Var. communis, fragilis, depressus
2. Chthamalus antennatus[460]
3. Chthamalus cirratus[461]
4. Chthamalus fissus[462]
5. Chthamalus dentatus[463]
6. Chthamalus Hembeli[465]
7. Chthamalus intertextus[467]
8. Chthamalus scabrosus[468]
13. Nov. Genus Chamæsipho[470]
1. Chamæsipho columna[470]
2. Chamæsipho scutelliformis[472]
14. Nov. Genus Pachylasma[475]
1. Pachylasma giganteum[477]
2. Pachylasma aurantiacum[480]
15. Genus Octomeris[482]
1. Octomeris angulosa[483]
2. Octomeris brunnea[484]
16. Genus Catophragmus[485]
1. Catophragmus polymerus[487]
2. Catophragmus imbricatus[490]
Remarks on Bronn’s List of Fossil Balaninæ and Chthamalinæ[492]
Family Verrucidæ[495]
Genus Verruca[496]
Powers of Excavation[512]
1. Verruca Strömia[518]
2. Verruca lævigata[520]
3. Verruca Spengleri[521]
4. Verruca nexa[522]
5. Verruca prisca[525]
Family Lepadidæ[526]
Genus Alcippe[529]
Alcippe lampas[530]
Female[530]
Male[555]
Order II.—Abdominalia[563]
Cryptophialus minutus[566]
Female[566]
Male[584]
Order III.—Apoda[587]
Proteolepas bivincta[589]
Synopsis et Index Systematicus[606]
Synopsis et Index Systematicus Specierum, et recentium, et fossilum[611]
Description of plates[641]
Plate 1. Balanus tintinnabulum[641]
Plate 2. Genus Balanus[641]
Plate 3. Genus Balanus[642]
Plate 4. Genus Balanus[642]
Plate 5. Genus Balanus[642]
Plate 6. Genus Balanus[643]
Plate 7. Genus Balanus[643]
Plate 8. Genus Balanus[644]
Plate 9. Sub-Genus Acasta[644]
Plate 10. Genus Tetraclita[645]
Plate 11. Genera Tetraclita and Elminius[645]
Plate 12. Genera Elminius and Pyrgoma[646]
Plate 13. Genera Pyrgoma and Creusia[646]
Plate 14. Genera Creusia and Chelonobia[647]
Plate 15. Genera Chelonobia and Coronula[648]
Plate 16. Genus Coronula[649]
Plate 17. Genera Platylepas, Tubicinella, and Xenobalanus[651]
Plate 18. Genus Chthamalus[652]
Plate 19. Genera Chthamalus, Chamæsipho, and Pachylasma[652]
Plate 20. Genera Pachylasma, Octomeris, and Catophragmus[653]
Plate 21. Genus Verruca[654]
Plate 22. Alcippe lampas[655]
Plate 23. Genera Alcippe and Cryptophialus[658]
Plate 24. Genera Cryptophialus and Proteolepas[660]
Plate 25. Genera Proteolepas and Balanus[662]
Plate 26. Structure of the Mouth and Thorax[664]
Plate 27. Nervous System and Senses[666]
Plate 28. Cementing Apparatus[667]
Plate 29. Cirri and Larvæ, first stages[669]
Plate 30. Larvæ of Lepas: second and last stages of development[671]
Errata[674]
Index[675]
Plates[685]

List of Illustrations.

Woodcuts on page 3*
Figure 1. Shell[3*]
Figure 2. Compartments[3*]
Figure 3. Compartments[3*]
Figure 4. Compartments[3*]
Figure 5. Scutum (internal view of)[3*]
Figure 6. Tergum (external view)[3*]
Figure 7. Tergum (internal view)[3*]
Woodcuts on other pages
Figure 1. Rostrum with two radii, serving in Chthamalinæ for rostro-lateral compartments[36]
Figure 2. Always serving for lateral and carino-lateral compartments[36]
Figure 3. Carina, serving in the Chthamalinæ, also, as a rostrum[36]
Figure 4. Octomeris[39]
Figure 5. Chthamalus[39]
Figure 6. Chamæsipho[39]
Figure 7. Balanus[39]
Figure 8. Tetraclita[39]
Figure 9. Basal edge of wall of compartment in Balanus tintinnabulum[43]
Figure 10. Edge of the radius of Balanus tintinnabulum[46]
Figure 11. Portion of edge of basis of Balanus tintinnabulum[50]
Plates
Plate 1. Balanus tintinnabulum[685]
Plate 2. Balanus[686]
Plate 3. Balanus[687]
Plate 4. Balanus[688]
Plate 5. Balanus[689]
Plate 6. Balanus[690]
Plate 7. Balanus[691]
Plate 8. Balanus[692]
Plate 9. Acasta[693]
Plate 10. Tetraclita[694]
Plate 11. Tetraclita: Elminius[695]
Plate 12. Elminius: Pyrgoma[696]
Plate 13. Pyrgoma: Creusia[697]
Plate 14. Creusia: Chelonobia[698]
Plate 15. Chelonobia: Coronula[699]
Plate 16. Coronula[700]
Plate 17. Platylepas: Tubicinella: Xenobalanus[701]
Plate 18. Chthamalus[702]
Plate 19. Chthamalus: Chamæsipho: Pachylasma[703]
Plate 20. Pachylasma: Octomeris: Catophragmus[704]
Plate 21. Verruca[705]
Plate 22. Alcippe lampas[706]
Plate 23. Alcippe: Cryptophialus[707]
Plate 24. Cryptophialus: Proteolepas[708]
Plate 25. Proteolepas: Balanus[709]
Plate 26. Mouth: Thorax[710]
Plate 27. Nervous System[711]
Plate 28. Cementing Apparatus[712]
Plate 29. Cirri: Larvæ, first stages[713]
Plate 30. Larvæ, last stages[714]

THE

RAY SOCIETY.

INSTITUTED MDCCCXLIV.

LONDON.

MDCCCLIV.

A MONOGRAPH
ON THE SUB-CLASS
CIRRIPEDIA,
WITH
FIGURES OF ALL THE SPECIES.

BY

CHARLES DARWIN, F.R.S., F.G.S.

THE BALANIDÆ,

(OR SESSILE CIRRIPEDES);

THE VERRUCIDÆ,

ETC., ETC., ETC.

LONDON:
PRINTED FOR THE RAY SOCIETY.
MDCCCLIV.

Reprinted with the permission of the Ray Society

JOHNSON REPRINT CORPORATION
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First reprinting, 1968, Johnson Reprint Corporation
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