PLATE XXVIL 



PAGE. 



Pig. 1. Tuditanus radiatus, C<npe:. Head. Natural size .394 



2. Brachydectes Newberryi, Cope. Jaws. Twice natural size 388 



3. Oestocephalus rectidens. Cope. Twice natural size 386 



4. Vertebra}, perhaps of the same. Natural size ! 386 



5. Oestocephalus ? remex,-Cope. Twice natural size .- 381 



6. Ptyonins Marshit, Cope. Twice natural .size 375 



7. Ptyonius pcctinatus. Cope. Twice natural size .377 



