ALPHABETICAL LIST OP GENERA. 



1439 



Stenaster 



Stenopora 



Stenotheca , 



Stephanella 



Stephanocrinus. 



Stictopora 



Stictoporella 



Stictotrypa 



Stigmatella 



Stomatopora 



Straparollina 



Straparollus 



Strep taster 



Strep telasma 



Streptis 



Streptoceras 



Strep tomytilus. . 



Streptosolen 



Streptospongia. . 

 Streptotrochus. . 



Strepula 



Striatopora 



Stribalocystites. 

 Stricklandinia. . 

 Stromatocerium . 

 Stromatopora... 

 Stromatoporella . 

 Stromatotrypa.. 

 Strombodes... 



Stropheodonta (subgenus Brachy- 



prion) 



Strophograptus 



Strophomena 



Strophonella (subgenus Stropho- 



prion) a . 



Strophoprion 



Strophostylus 



Strotospongia 



Stylaraea 



Styliola 



Stylodictyon 



Stylonurus (subgenera Ctenopte- 



rus and Drepanopterus) 



Subulites 



Suecoceras 



Symphysurus 



Synbathocrinus 



Syndyograptus 



Synhomalonotus 



Syntrophia 



Syringolites 



Syringopora (subgenus Drymo- 



pora) 



Page. 

 1414 

 1416 

 1421 

 1407 

 1413 

 1416 

 1416 

 1416 

 1415 

 1415 

 1421 

 1421 

 1412 

 1408 

 1418 

 1423 

 1419 

 1407 

 1407 

 1421 

 1425 

 1409 

 1411 

 1418 

 1409 

 1409 

 1409 

 1416 

 1408 



1418 

 1410 

 1418 



1418 

 1418 

 1421 

 1407 

 1409 

 1422 

 1409 



1426 

 1421 

 1422 

 1424 

 1423 

 1410 

 1425 

 1418 

 1407 



1409 



Page. 



Syringostroma 1409 



Tseniaster 1414 



Tseniodictya 1416 



Tanaocrinus 1413 



Tarphyceras 1422 



Technophorus 1425 



Teganium 1408 



Telephus 1425 



Temnocrinus 1413 



Temnograptus 1410 



Tentaculites. 1422 



Teratichnus 1411 



Tetracystis 1411 



Tetradella 1425 



Tetradium 1409 



Tetragraptus _1410 



Tetranota "l421 



Thalamocrinus 1414 



Thaleops 1424 



Thamniscus 1416 



Thamnograptus 1410 



Thecia 1409 



Thlipsura : 1425 



Thysanopyge 1425 



Tolmaia 1419 



Trachomatichnus 1411 



Trachyum 1407 



Tremanotus 1421 



Trematis 1417 



Trematocystis 1411 



Trematopora 1416 



Trematospira 1419 



Tretaspis 1424 



Triarthrus '. 1424 



Trichophycus 1427 



Trichospongia 1408 



Trigonodictya 1416 



Tiagonograptus 1410 



Trigyra 1420 



Trimerella 1417 



Trimeroceras 1423 



Trimerocystis 1411 



Trimerus * 1425 



Trinucleus 1424 



Triplecia 1428 



Tripleuroceras 1423 



Tripteroceras 1423 



Trochoceras 1422 



Trocholites 1422 



Trocholitoceras 1422 



Trochonema (subgenus Eunema) . . 1421 



Troostocrinua 1412 



Tryblidium 1420 



