INDEX. 



n.b. The names in italics are synonyms or doubtful species. 



Abdomen of the Balanidae, 65. 



of larvae in first stage, 108. 

 in pupa of Alcippe, 548. 

 Abdominalia, order of, 21, 563. 

 Acasta, sub-genus, 302. 

 cyathus, 312. 

 fenestrata, 316. 

 glans, 314. 

 laevigata, 315. 

 Montagui, 308, 492. 

 purpurata, 318. 

 spinulosa, 321. 

 spougites, 308. 

 sporillus, 319. 

 sulcata, 310. 

 tubulosa, 320. 

 undulata, 313. 

 Acorn shell, 33. 

 Adductor scutorum, 53. 

 Adna, genus, 354. 



anglica, 360. 

 Affinities of the Balanidae, 152. 

 Alee, structure of, 37, 47. 

 Alcippe, genus, 529. 



lampas (female), 530. 

 lampas (male), 555. 

 sexes of, 23. 

 Anelasma, false, resemblance to Xeno- 

 balanus, 445. 

 compared with Alcippe,528. 

 Antennae of larva in first stage, 105. 

 of pupa, 11 4. 



of Alcippe, 549. 

 of Cryptophialus, 



581. 

 of Proteolepas, 601. 

 Anus, 87. 



none in Proteolepas, 596. 



in the male Alcippe and 

 Cryptophialus, 546, 562, 585. 



Apoda, order of, 22, 587. 



Apodemes for the attachment of eyes 



of pupa, 120, 126. 

 Apparatus, cementing, 133. 

 Appendages, caudal, 65, 85, 479,481, 



491. 

 in Verruca, 510 

 iu Alcippe, 543 

 filamentary, to sack, 64. 

 to limbs, 64, 

 83. 

 Asemus, genus, 321. 



poms us, 329. 

 Astrolepas, genus, 382. 

 lav is, 396. 

 rotunda rius, 392. 

 Attachment of Chelonobia to turtles, 

 390. 

 of Coronula to whale's 



skin, 411. 

 of Tubicinella, 436. 



Baer, Von, on morphological differen- 



tation, 19. 

 Balanidae, family of, 33. 



highest Cirripedes, 20. 

 Balaninae, sub-family of, 175. 

 characters of, 152. 

 Balanus, genus, 177- 



shell of, immediately aftei 

 the metamorphosis, 41. 



supposed male of, 271. 



Ajax, 214. 



allium, 281. 



amaryllis, 279. 



amphimorpkus, 494. 



amphitrite, 240. 



angulosus, 256. 



arctica patellijbrmis, 256. 



