1887.] 



NATURAL SCIENCES OF PHILADELPHIA. 



469 



Tritylodon 282, 286 



Trochiia ..399, 404 



Trochomorpha.. 126, 127, 128 



Ti-ochonanina 125, 126 



Trochospongilla 176, 177 



Troilus 129 



Tropidonotus 121 



Truncatella 145, 146 



Truncatulina 55 



Tubella....l71, 180, 181, 227, 248-254 



Turbinella 341, 397, 398, 401, 403 



Turbo 399, 404 



Turbonilla 51 



Tun-itella..54, 341, 397, 399, 401, 404 



Unicardium 53 



Uromastix 359 



Umguaya 180, 268 



Uveana 143 



Vertigo 137, 138 



Vicia 323 



Videna 127 



Viola 325 



Voandesia 323 



Venus 341, 397, 398, 401, 403 



Voluta 141 



Yoldia 397, 398, 402 



Zonites 125, 126 



