Chapter III: 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

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 111 Fifth Avenue, New York, N. Y. 10003

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First reprinting, 1968, Johnson Reprint Corporation Printed in the United States of America

TO

PROFESSOR H. MILNE EDWARDS,

DEAN OF THE FACULTY OF SCIENCES OF PARIS;
PROFESSOR AT THE MUSEUM OF NATURAL HISTORY;
MEMBER OF THE INSTITUTE OF FRANCE;
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THIS WORK IS DEDICATED,

WITH THE MOST SINCERE RESPECT,

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