43 
Comparison of faunas in Trenton and Black River 
Rock- 
land 
Pelecypoda 
Clionychia sp 
Ctenodonta cf. contracta Saltej* 
Ctenodonta levata (Hall) 
Ctenodonta nasuta (Hall) 
Cyrtodonta cf. billingsi Ulrich 
Cyrtodonta canadensis Billings. . . . 
Cyrotodonta huronensis Billings . . . 
Cyrotodonta cf. huronensis Billings 
Cyrtodonta sp 
Endodesma sp 
Pterinea sp 
r 
r 
r 
r 
c 
c 
r 
Gastropoda 
Bellerophon sp 
Bucania halli Ulrich and Scofield 
Bucania punctifrons Emmons 
Bucania sp 
Hormotoma bellicincta (Hall) 
Hormotoma gracilis (Hall) 
Hormotoma trentonensis Ulrich and Scofield 
' H. sp 
Liospira abrupta Ulrich and Scofield 
Liospira americana (Billings) 
Liospira progne Billings 
Liospira vitruvia (Billings) 
Liospira cf . vitruvia (Billings) 
L. sp. ....... _ 
Lophospira bicincta (Hall) 
Lophospira perangulata (Hall) 
Lophospira sp. near perangulata (Hall) 
L. sp 
cf. Maclurites cuneata (Whitfield) 
Maclurites logani Salter 
M. sp 
M. sp. (opercula) 
Metoptoma estella Billings 
Omospira alexandra Billings 
Phragmolites compressus Conrad 
Protowarthia sp. 
Raphistoma distincta n. sp 
Raphistomina cf. lapidica Salter 
Salpingostoma sp 
Sinuites cancellatus (Halt) 
cf. Strophostylus textilis Ulrich and Scofield. 
Subulites conradi Ulrich and Scofield 
Subuliies elongatus Conrad 
Tetranota bidorsata (Hall) 
Trochonema umbilicatum (Hall) 
c 
r 
r 
? 
c 
c 
r 
r 
r 
r 
r 
r 
r 
c 
c 
r 
c 
r 
r 
c 
r 
r 
r 
r 
r 
r 
r 
r 
r 
cc 
cc 
r 
c 
c 
r 
r 
\ 
