EXPLANATION OF PLATE XIV. 



Figures one-half natural size. 



Fig. 1~ Cranium of CHdastcs tortor, side-view : end of dentary bone wanting; inaudible viewed from the 

 outer side. * 



2. Clidastes sienops, right ramus of the mandible ; 2 a, side-view of prefrontal bone. 



3. Cranium of Platccarpxts curtirostris, side-view : the mandible viewed from the inner side. 



4 Platecarpus ictericw, right dentary bone from the outside; a, surangiilar bono from the inside; 

 b, inner view of fragment of left dentary bone ; c, proximal view of the fragment. 



