208 



BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 



Page. 

 183 

 98 



141 

 144 



48 



Scissnrella. 



Searlesia 



Seguenzia 



Sella 



Setnele 



Scmibittium 146 



Septifer ^1 



Serridens °' 



40 

 Serripes 



Siliqua 50 



Simma i0 * 



Simum 165 



SiphonaHa 06 



Siphonodentalium 58 



Skeneopsis 15S 



Solaricida 177 



Solariella 177 



Solemya 9 



Solen. 



50 



Sphenia 53 



Spirateila 58 



Spiroglyphus 151 



Spisula 51 



Spongioradsia 189 



SporteUa 38 



Stenoplax , 190 



Stenoradsia 190 



Strigatella 86 



Striotcrebrum 67 



Strioturbonilla I 21 



Stronibiformis 119 



Stylidium l 45 



Styliola 59 



Suavodrillia 69 



Sulcosinus 9- 



Sulcosipho 96 



Sulcularia i 61 



Sveltia 84 



Symmctrogephyrus 198 



Symmorphomactra 52 



Syncera 101 



Tachyrhynchus 152 



Tagclus 50 



Taranis -. 83 



TeguJa *74 



Tcinostoma 182 



Tellina 4 5 



Tcrebra 07 



Teredo 56 



Tethys 05 



Thais HI 



Thala S7 



Page 



Thracia 25 



Thyasira ^3 



Thylacodcs 153 



Tindaria 15 



Tivela 41 



Tonicella 18S 



Tonicia 195 



Torellia 107 



Tra chycardium 39 



Transennella 41 



Trichotropis 148 



Tricolia I'l 



Tridonta 30 



Trifora ~ I 42 



Trigoniocardia 39 



Tripoplax 193 



Trircmis 100 



Tritonalia 107 



Trivia 140 



Trophon 109 



Trophonopsis 111 



Truncatella 100 



Turbonilla 120 



Turcica 177 



Turcicula 177 



Turritella 151 



TurritcUopsis 152 



Turtonia 3S 



Tylodina 65 



Urosalpinx- 



109 



107 



42 



31 



44 



41 



42 



150 



151 



29 



40 



181 



Volutharpa— 102 



Volutomitra 87 



Volutopsius ' 89 



Volvulella 62 



Velutina 



Venerella 



Vcnericardia- 



Vencrupis 



Yentriaola 



Venus 



Verrnicularia. 

 Vermiculum— 



Verticordia 



Vesicomya 



Vitrinella 



~\Y Uliamfa. 



Xiphtosona. 



Xylophaga- 



67 



187 

 56 



Yoldia 13 



Yoldiella 14 



Zeuxis 



Zirfaea 



55 



