INVERTEBEATE ANIMALS IN PALEOZOIC ROCXS. 



607 



Fig. 11. — a, 6, c, Sahellarites trentonensis. a. On a weathered 

 surface ; nat. size, h and c, enlarged. Black-river Limestone ; 

 Pointe Claire, near Montreal. 



Fig. 12.— a, 6, Transverse and Longitudinal Sections of Sahellarites. 

 (Enlarged.) 



y'y"^-:-' \^ 



m^ 



Ik 









.^J 



