42 
Comparison of faunas in Trenton and Black River 
Leray 
Rock- 
land 
Bryozoa 
Batostoma winchelli Ulrich 
c 
B. sp 
B. sp 
Coeloclema sp 
Dekayella praenmitia Ulrich 
Dianulites rocklandense n. sp *. . . 
Escharopora frondosa n. sp 
E. sp 
Favositella laxata (Ulrich) 
Hallopora multitabulata (Ulrich) . . . 
Hemiphragma tenuimurale (Ulrich) 
Nicholsonella ottawaensis n. sp 
Pachydictya acuta (Hall) 
Prasopora grandis Ulrich 
P. cf. insularis Ulrich 
P. simulatrix var. orientalis Ulrich. 
Rhinidictya fidelis Ulrich 
R. muUabilis Ulrich 
r 
r 
c 
c 
c 
r 
r 
c 
c 
r 
r 
r 
c 
r 
c 
cc 
cc 
cc 
R. sp. 
c 
Brachiopoda 
Camerella panderi Billings 
C. sp 
Crania trentonensis Hall 
C. sp 
Cyclospira bisulcata (Emmons) 
Dalmanella rogata (Sardeson) 
Dinorthis sp 
Glyptorthis bellarugosa (Coprad) 
Lingula obtusa 
Orthis disparilis Billings 
Orthis tricenaria Conrad 
Parastrophia hemiplicata Hall 
Petrocrania ulrichi (Hall and Clarke) 
Pianodema subaequata (Conrad) 
Plaesiomys sp 
Platystrophia amoena McEwan 
Plectorthis pectinella (Hall) 
Plectambonites sericeus (Sowerby) 
Rafinesquina alternata (Emmons) 
Rafinesquina minnesotensis (N. H. Winchell) 
Rafinesquina rugosa n. sp 
Rafinesquina sp. 
Rhynchotrema increbescens (Hall) 
Strophomena filitexta Hall 
Strophomena cf. scofieldi Winchell and Schuchert 
Triplecia cuspidata (Hall) 
Triplecia extans (Emmons) 
Zygospira recurvirostris Hall 
r 
r 
r 
c 
r 
cc 
r 
r 
c 
r 
c 
cc 
r 
c 
r 
r 
r 
cc 
r 
? 
r 
c 
cc 
c 
r 
r 
r 
r 
cc 
cc 
cc 
c 
c 
c 
r 
c 
c 
