PI.ATE 36. 



Dentition both jaws. 



J'IG. 54 — ^isTotums tiavus Raf. 

 Ohio K., W. Va. Eeduceil one-sisth. 



Fig. 55 — Koturus flavua Baf. 

 Ohio R., W. Va. Eeduced one-sixth. 



Fig. 56 — Notiu'iis insignis (Eicli ) G. & J. 

 Penna. 



