INDEX. 



483 



tetra-branchiata, 77. 

 Tetraplodon, 275. 

 Teudopsis, 69. 

 Teuthis, 69. 

 Thalassides, 302. 

 Thalia, 344. 

 Thallicera, 139. 

 Theca, 205. 

 Thecacera, 191. 

 Thecidium, 221. 

 thecoBomata, 204. 

 Thetis, 319. 

 Thiara, 131. 

 Thoracoceras, 449. 

 Thyreus, 113. 

 Tiara, 119. 

 Tichogonia, 266. 

 Tiedemannia, 206. 

 TomeUa,118. 

 Tomigenis, 163. 

 Tonicia, 157. 

 Torcula, 132. 

 Torinia,135. 

 TornateUa, 180, 

 Tornatellina, 166. 

 Tornatina, 181. 

 Torquilla, 165. 

 toxiglossa, 450. 

 Toxoceras, 95. 

 Trapezium, 300. 

 Tremati8,238. 

 Tremoctopus, 65, 68. 

 Trichites, 264. 

 Trichocyclus, 209. 

 Trichotropis, 108, 



455. 

 Tricolea, 143. 

 Tridacna, 290, 469. 

 Tridonta, 299. 

 Tridopsis, 163. 



Triforis, 128. 

 Trigona, 305. 

 Trigonella, 226,308, 



312. 

 trigonellitea, 80. 

 Trigonia, 271. 

 Trigonoceras, 450. 

 Trigonocoelia, 268. 

 Trigonosemus, 217. 

 Trigonotreta , 223. 

 Trigomilina, 471. 

 Triopa, 191. 

 Triptera, 205. 

 Triton, 107, 453, 

 Tritonia, 23, 192. 

 Trochalia, 129, 

 Trochatella, 152, 178, 

 Trochiscus, 143. 

 Trochoceras, 87, 

 Trocholites, 87. 

 Trochotoma, 148. 

 Trochus, 28, 143, 

 Trophon, 109. 

 tropical, 353. 

 Tropidophora, 176. 

 Trop(eum, 95. 

 Truncatella, 137. 

 Tuba, 137. 

 Tudora, 176. 

 Tugonia, 317, 367. 

 Tunicata, 8, 331. 

 Turbinella, 108. 

 Turbonilla, 126, 

 Turbo, 142. 

 Turrilites, 96. 

 Turritella, 132. 

 Twi-is, 118. 

 Turtonia, 295. 

 types, 61. 

 Tylostoma, 181. 



Tylodina, 188, 

 Typhis, 106. 

 Tympanostomus, 128. 



umbo, 37. 

 umbones, 245. 

 Umbrella, 187, 465. 

 uncini, 28. 

 Uncites, 225. 

 Ungula, 240. 

 Ungulina, 294. 

 Unicardium, 293. 

 Unio, 246, 274. 

 Unionites, 301. 

 univalves, 36. 

 Utriculus, 183. 



Vagina, 315. 

 Vaginella, 205 

 Vaginulus, 170. 

 Valvata,140. 

 Vanganella, 486. 

 Vanicoro, 124. 

 varices, 17,43, 

 varieties, 57. 

 Varigera, 181. 

 Velates, 141. 

 Velletia, 172. 

 Velutina, 124, 454, 61. 

 Venericardia, 303. 

 Venerupis, 307. 

 Tenilia, 195. 

 ventricle, 30, 

 Venus, 304. 

 Verania, 72, 364. 

 Vermetus, 133. 

 Veronicella, 170. 

 Verticordia, 304.471, 

 Vertigo, 165. 

 Vexillaria, 346. 



Vibex, 131, 

 vibracula, 24. 

 Vicarya, 462. 

 Villiersia, 191. 

 violet-snail, 148. 

 vitellus, 51. 

 Vitrina, 30, 163. 

 Vitrinella, 463. 

 viviparous repr. 49. 

 Viviparus, 138. 

 Volupia, 305, 

 Voluta, 119, 454, 

 Volutella,UQ. 

 Volutilithes, 119, 

 Volva, 122. 

 Volvaria, 120. 

 Vulsella, 261, 



Waldheimia, 210, 16. 

 Waltonia, 220. 

 Aventle-trap, 16, 133, 

 whelk, 13,28,110, 

 worm-shell, 133. 



Xanthonella, 182, 

 Xeiwphortts, 135. 



Yetus, 119. 

 Yoldia, 270, 468. 



Zaria, 132. 

 Zellania, 463, 

 Zephrina, 195. 

 Zierliana, 119. 

 Zirfaa, 328. 

 zo'id, 336. 

 Zonites, 163. 

 zoophaga, 452, 

 Zua. 164. 



Atractodon, Charl. v. Chrysodomus. 

 Chilotrema, Leach, v. Carocolla. 

 Coleoceras, Portl. v. Orthoceras, 

 C'ordieria, Roault, r, Borsonia. 

 Cryptodon, Conr. v. Lutraria. 

 Cypricia, Gray, v. Lutraria. 

 Ellipsolithcs, Sby. v. Goniatites. 

 Gaimarda, Gould, r, Modiolarca. 

 Gladius, " Klein," v. Rostellaria. 

 Harpago, " Klein," f. Pteroceras. 

 Macoma, Leach, v. Psammotea. 

 Mazza, " Klein," v. Turbinella. 



Neptunea, " Bolten," v. Chi-ysodomus. 

 Orthostoma, Buv. v. Acteoniua. 

 Phascolicama, Val. v. Modiolarca. 

 Polyphemopsis, Portl. v. Macrochilus. 

 Ptychomphalus, Ag. v. Rotella. 

 Separatista, (helicina). Gray MS. = ? 

 Sidemina, Casteln. v. Apioceras ? 

 Spiricella, Rang, v. Pileopsis? 

 Thyatira, Leach, v. Cryptodon. 

 Tugali, Gr. v. Hemitoma. 

 Vasum, " Link," v. Cyuodonta. 

 Xancus, " Link," v. Turbinella. 



