INDEX. 



231 



Tapes, 70. 



Tebcnnophorus, 206. 

 Tectura, 85. 

 Tellimya, 67. 

 TeUina, 52, 58, 72. 

 Teredo, 80. 

 Tergipes, 162, 164. 

 Tethys, 153. 

 Thais, 132. 

 Thracia, 36. 

 Thyasira, 62. 

 Tonicella, 8. 

 Torellia, 124. 

 Tornatella, 147. 

 Tornatina, 147. 

 Totteniana, 71. 

 Trachydermon, 9. 

 Trichotropis, 124. 

 Tridonta, 44. 

 Triforis, 126. 

 Trigonulina, 39. 

 Triodopsis, 195, 197. 

 Triphoris, 126. 

 Triptera, 159. 

 Tritia, 135. 

 Tritonia, 169. 

 Tritonium, 131, 136, 142. 

 Trochus, 88. 

 Trophon, 131. 

 Tropidocyclas, 58. 

 Truncatella, 111, 119. 

 Turbo, 87, 89, 111, 116, 119, 213. 

 Turbonilla, 92, 93. 

 Turritella, 94, 98, 104, 117, 122, 

 123, 127. 



Turritellopsis, 123. 

 Turtonia, 67. 

 Typhlomangelia, 145. 



Unio, 21, 25, 27. 

 Urosalpinx, 132. 

 Utriculus, 147, 150, 152. 



Vallonia, 216. 

 Valvata, 112. 

 Velutina, 108. 

 Venericardia, 60. 

 Venus, 42, 67, 70. 

 Bermetus, 123. 

 Vermicularia, 123. 

 Verticordia, 39. 

 Vertigo, 209, 212, 213. 

 Vertilla, 215. 

 Vitrea, 199. 

 Vitrina, 199. 

 Viviparus, 112. 

 Volvaria, 147, 150. 



Xylophaga, 80. 

 Xylotrya, 82. 



Yoldia, 14. 

 YoldieUa, 15. 



Zirfaea, 80. 

 Zonites, 198, 204. 

 Zonitoides, 202. 

 Zoogenites, 211. 

 Zua, 216. 



