PI.ATE 6. 



Fig. 11 — Amiurus niveiventris (Cope.) 

 Neuse River. (Pro.n type.) Reduced. 



Fig. 12 — Amiurus niveiventris (Cope.") 

 Neuse River. (From type.) Reduced. 



Fig. 13 — Amiurua nigricans (Le S.) Gill. 

 Lake Erie. 



