INDEX. 



523 



Planorbis — Continued. 



campanulatns, 492. 



deflectus, 494. 



clilatatus, 498, 



elevatus, 497. 



exacutus, 493. 



hirsutus, 493. 



lentus, 490. 



parvus, 497. 



tiivolvis, 488. 

 Pleurotonia hicariiiata, 349. 



decassata, 354. 



plicata, 3h0. 

 Polycera Lessonii, 226. 

 Pomatiopsis lapidaria, 295. 

 Pupa annifcra, 437. 



badia, 433. 



contracta, 438. 



cortifaria, 439. 



curvidens, 434. 



decora, 435. 



exiqua, 466. 



faliax, 436. 



Hoppii, 433. 



miUain, 441. 



modesta, 442. 



muscorum, 433. 



pentodon, 434. 



ruiiicola, 439. 



simplex, 444. 

 Purpura lajtillus, 360. 

 Psyche g-lobulosa, 504. 

 Pi/ramis striatula, 33.3. 

 Pijiula. iSee Busyeon. 



R. 



Ilanella caudata, 386. 

 Kliyiichoucda psittacea, 210. 

 liissoa aculeus, 299. 



carinata, 301. 



ebtirnea, 297. 



exarata, 301, 



latior, 299. 



Mij,-helsi, 301. 



minuta, 298. 



multilineata, 300. 

 Rissoella eburnea, 297. 



sulcosa, 297. 

 Rostellaria occidentalis, 320. 



S. 

 Salpa Caboti, 6. 

 Sanyuinolaria fnsca, 93. 



sordida, 95. 

 Saxicava arctica, 86. 



distorta, 87. 



rup;osa, 87. 

 Scalaria Grcenlandica, 314. 



lincata, 312. 



multistriata, 313. 



Novangliaj, 311. 

 Scaphauder punctustriatus, 215. 



Segmcntina armigera, 499. 

 Sigaretus haliotoideus, 337. 

 Skenea planorbis, 296. 



serpuloides, 296. 

 Solecurtus Caribceus, 43. 



difisus, 44. 

 fra<iiUs, 44. 



gilibus, 43. 

 Solemya borealis, 50. 



velum, 48. 

 Solen Araericanus, 42. 



ensis, 40. 

 Spliairium occidentale, 108. 



partunieiuin, 103. 



rhomboideum, 104. 



securis, 107. 



simile, 101. 



tcnue, 107. 



truucatum, 106. 



Vermontanum, 105. 

 Spinalis Flemingii, 505. 



Gonldii, 505. 

 Spirulafra(/i/is, 516. 



Peroiiii, 516. 

 Succinea avara, 446. 



obli([ua, 447. 



ovalis, 445. 



Totteuiaua, 448. 



Tapes fluctuosa, 136. 

 Tebennopliorus Carolincnsis, 457. 



dorsalis, 460. 

 Tectura alvcus, 269. 



testudinalis, 269. 

 Tellina tenera, 97. 



tenta, 96. 

 Terebratula caputserpentis, 208. 



psittacea, 210. 

 Terebratulina caputserpentis, 208. 

 Teredo clilorotica, 33. 



diliitiita, 32. 



megotara, 30. 



navalis, 28. 



Norvagica, 29. 



Thomsonii, 31. 

 Thracia Conradi, 69. 



myopsis, 71. 



truncata, 72. 

 Thi/asira Gouldii, 100. 

 Tornatella punctostriata, 224. 

 Trieliotropis borealis, 390. 

 Triforis nir/rocinctus, 323. 

 Tiochus occidentalis, 286. 

 Trophon clathratus, 377. 



muricatus, 379. 



scalariformis, 378. 

 Turbonilla interrupta, 331. 



nivea, 331. 

 Turritella acicula, 319. 



costulata, 318. 



erosa, 317. 



impressa, 330. 



