Canada, Geol. Surv. Canada, 1863, 

 eylvania, Rep. P 4, 1889, p. 547, fig; 

 3, 1890, p. 34. 

 Canadian (Romaine): Mingan Islands, 



ORTHOCERAS DIFFIDENS Billings. See Lo:s 



Orthoceras drummondi Billings. 



Orthoceras Drummondi Billings, Pal. I 



fig. 156. 

 Black River: Near Kingston, Ontario. 



Orthoceras duserl Hall and Whitfield. 

 Orthoceras Duseri Hall and Whitfield, 

 3, figs. 2-4. James, J. F., Jour. 0: 



trl 



flty,, Gjal. -::;& . i'qilr ......... i 



; ma '. ta*. 1,. ..... ....... iljst., ............. 



ft* 



1' 



