INDEX. 



681 



Lesson on the Triton, 158. 



Limbs of pupa, 121 . 



Limbus occludens in Pyrgoma, 54. 



Lime, tendency to harden with animal 



matter, 552. 

 Limulus, nervous system of, 88, 90. 

 Linnseus on the Triton, 158. 

 Lithotrya, powers of boring, 535. 

 Liver, 86. 

 Lyell, Sir C, on Bal. Uddevallensis, 



277. 



Male organs, 97. 



of Alcippe lampas, 555. 

 of Crytophialus minutus, 584. 

 Males of Cirripedes, 23. 



of Cirripedes, not of much 



classificatory importance, 566, 586. 



Manatee, with Platylepas attached to 



the skin, 427. 

 Mandibles structure of, 76, 79. 



reversed in Proteolepas, 

 589. 

 Maxillae, structure of, 76, 80. 



reversed in Proteolepas, 590. 

 Megatrema, genus, 354. 

 Anglica, 360. 

 semicostata, 374. 

 Membrane, covering the shell, 58. 



opercular, 58. 

 Messula, genus, 177. 

 Metagenesis, 124. 



Metamorphoses in the thoracica, 102. 

 of Alcippe, 548. 

 remarkable, in Crypto- 

 phialus, 579. 

 Moulting of the pupal membrane, 123. 

 in the mature animal, 157. 

 Mouth, structure of, 74, 78. 

 of pupa, 121. 

 none in the male Alcippe and 



Cryptophialus, 562, 585. 

 suctorial in Proteolepas, 589. 

 Movements of the cirri, 71. 

 Muscles of attachment of the body to 

 the operculum, 68. 

 of the sack, 62. 

 of the thorax, 69. 

 of the cirri, 71 . 

 of the jaws, 76. 

 of sack, weak in Chelonobia, 

 389. 



Nerves splanchnic, 91. 

 Nervous system, 88. 

 Nobia, genus, 354. 



Nobia grandis, 365. 

 Nomenclature, rules of, 204. 



Octomeris, genus, 482. 



angulosa, 483. 

 augubra, 483. 

 brunnea, 484. 

 Stidchburii, 483. 

 Ochthosia, genus, 497. 



Stroemia, 519. 

 (Esophagus, 85. 



in the pupa, 121. 

 with teeth, in Crypto- 

 phialus, 577. 

 Operculum, 50. 



remarkable, in Pyrgoma, 



356. 

 remarkable, in Verruca, 

 497. 

 Orders of Cirripedes, 20. 

 Organs, acoustic, 95. 



of pupa, 113. 

 of reproduction, 97. 

 for cementing, 133. 



in the pupa, 

 122. 

 Orifice of shell, 38. 

 Otolites absent in Crustacea, 97. 

 Ova, sizes of, 101. 

 Ovaria, 100. 



incipient, in pupa, 122. 

 occupy a- chamber in the shell 



in Coronula, 411. 

 in Proteolepas, 597. 

 Owen, Prof., on Metagenesis, 124. 



on vegetative repetition, 

 20. 



Pachylasma, genus, 475. 



structure of alse, 36. 

 giganteum, 172, 477. 

 aurantiacum, 480. 

 Palpi, structure of, 75. 



absent in Alcippe, 540. 

 peculiar in Cryptophialus, 572. 

 in Proteolepas, 590. 

 Parasite, allied to Bopyrus, 102. 

 Parietes of shell, 43. 



internal lamina of, cancel- 

 lated, 213. 

 perforated in Acasta, 305. 

 with numerous rows of pores 



in Tetraclita, 323. 

 much folded in Coronula, 399. 

 Penis, pubosciformed, 99. 



imperforate, 102, 271- 

 its reparation, 159. 



44 



