PLATE XXVII 



Described 

 on Page 



Fig. 1. Poatrephes paludicola Douglass. Superior view of skull. 



GHT. Cat. No. 845 CM. 200 



Fig. 2. Same as Fig. 1. Inferior view. 



Fig. 3. Tkholeptus bannackensis Douglass. Superior view of man- 

 dibular rami. HT. Cat. No. 995 CM. 187 



One-half natural size 



(Photographs from the Carnegie Museum) 



364 



