PLATE 44. 



FiO. 70 — Silurua glania, Linn, 

 European Catfish ; Sheatflsh. 



Lake Neufchatel, Switzerland. 



Pyloric cceca (a) 

 Fig. 71 — Stizostethium canadense {Smith) Jordan. 

 Reduced one-]).alf. 



Pyloric coeca (&) 



Fig. 73 — Stizostethium salmoneum Eaf. 



Reduced one-half. 



