44 



2089 Thais emarginata 



2087 Thais plicata 



2088 Variety septentrionalis Reeve. 

 2327 Thracia plicata Desh. 



1098 Thracia beringi Dall. 

 1097 Thracia curta Conrad. 



285 Thracia curta Conr 



286 Thracia plicata ? Desh 



1811 Thysanophora Hornii 



1812 Thysanophora Ingersolli 

 1813 — Variety convexior Ancey. 



116 Tivela crassatelloides 



2139 Tivela planulata Sby. 1829. 



2140 Tivella hians Phil. 1851. 



2141 Tivela arguta Roemer. 1864. 



2142 Tivela Byronensis Gray. 1838. 



2143 Tivela Delesserti Deshayes. 1854. 



2144 Tivela stultorum Ma we. 



117 Tivela radiata 



1270 Tonicella lineata Wood. 



1271 Tonicella submarmorea Middendorf. 



1272 Tonicella marmoi-ea 0. Fabricius. 

 2241 Tonites wascoensis 



262 Tornatella punctocaelata Cpr 



456 Tornatina carinata Carpenter. 



457 Tornatina cerealis Gould. 



1099 Tornatina culcitella Gould. 



263 Tornatina eximia Baird 



1100 Tornatina harpa Dall. 



1101 Tornatina inculta Gould. 



1268 Trachydermon dentiens Gould. 



1269 Trachydermon flectens Carpenter. 

 1650 Trachydermon Hartwegii 



1649 Trachydermon (Cyanoplax) Raymondi 



1703 Trachydermon Sharpii 



2138 Transennella tantilla Gould. 1853. 



1648 Tresus Nuttallii Conr. 1837. 1181 



1002 Trichoptropis bicarinata Broderip. 



1103 Trichotropis cancellata Hinds. 



1243 Trichotropis inermis Hinds. 



1473 Trichotropis? Kelseyi Dall. 



590 Triphoris adamsi. Off Chatham Island. 



1241 Triforis adversa Montagu. 



2503 Triopha grandis 



2502 Triopha maculata 



587 Triphoris alternatus C. B. Adams. Panama. 



577 Triphoris callipyrgus 



578 Triphoris carpenteri 



580 Triphoris catalinensis 



589 Triphoris chathamensis. Chatham Island 



585 Triphoris dalli. Panama. 



583 Triphoris excolpus 



588 Triphoris galapagensis. Galapagos Islands. 



579 Triphoris hemphilli 



586 Triphoris inconspicuus C. B. Adams. Panama. 



575 Triphoris montereyensis 



584 Triphoris panamensis. Panama. 



576 Triphoris pedroanus 

 582 Triphoris peninsularis 



581 Triphoris stearnsi 



