Teredo, 145. 
Testacella, 105. 
Tethys, 99. 
Tetrabranchia, 169. 
Thécosomes, 95. 
Thracia, 144. 
Thyca, 86. 
Thysanoteuthis, 17 
Titiscania, 85. 
Tornatina, 94. 
Toxiglossa, 91. 
Tremoctopus, 174. 
Tridacna, 142. 
Triforis, 86. 
Trigonia, 137. 
Triopa, 100. 
Triton, 88. 
Tritonia, 99. 
Tritoniens, 99. 
Trochus, 83. 
Trophon, 92. 
Truncatellla, 85. 
Turbo, 85. 
12 
MOLLUSQUES. 
Turrilites, 170. 
Turritella, 88. 
Tylodina, 98, 
Umbrella, 97. 
Ungulina, 159. 
Unio, 140. 
Urocyclus, 105. 
Urosalpinx, 92. 
Vaginulus, 105. 
Valvata, 85. 
Velutina, 86. 
Veneracea, 141. 
Venus, 141. 
Veranya, 172. 
Vermetus, 87. 
Vertigo, 104. 
Vitrina, 105. 
Voluta, 92. 
Volutharpa, 46. 
Vulsella, 158. 
Xenophora, 88. 
Zonites, 105. 
Zospeum, 10%. 
— 
