76 



AMERICAN FOSSIL BRYOZOA. 



[bull. 173. 



Lists of species — Continued. 

 TRENTON— Continued. 



Eridotrypa mutabilis Ulrich 



mutabilis-niinor Ulrich 



trentonensis (Nicholson) 



Escharopora angularis Ulrich 



briareus ( Ulrich ) 



confluens Ulrich 



libana (Safford ) 



? limitaris Ulrich 



ramosa (Ulrich) 



recta Hall , 



recta-nodosa Hall , 



subrecta (Ulrich) 



Eurydictya calhounensis Ulrich 



multipora ( Hall ) 



Helopora alternata Ulrich 



divaricata Ulrich 



mucronata Ulrich 



quadrata Ulrich 



spiniformis ( Ulrich ) 



Hemiphragma irrasum ( Ulrich ) , 



ottawense (Foord ) 



tenuimurale Ulrich 



Homotrypa ? arbuscula Ulrich 



callosa Ulrich 



exilis Ulrich 



? intercalaris Ulrich 



minnesotensis Ulrich 



minnesotensis-montifera Ulrich . 



separata Ulrich 



? similis Foord 



subramosa Ulrich 



subramosa-insignis Ulrich 



tuberculata Ulrich 



Homotrypella granulifera ( Ulrich) 



instabilis Ulrich 



multiporata Ulrich 



mundula Ulrich 



? ovata Ulrich 



? subgracilis Ulrich 



stones 

 River. 



X 

 X 



X 

 X 

 X 



X 



X 

 X 



X 

 X 



X 

 X 



Black 

 River. 



X 

 X 



X 



X 

 X 



X 

 X 



X 

 X 

 X 



X 

 X 



X 

 X 



X 

 X 



