IO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 139 



Characters. — Size large ; skull broad and heavily ridged ; brain 

 case flattened dorsally and ventrally ; foramen magnum posteriorly 

 oriented ; cheek teeth large ; auditory bullae large and inflated antero- 

 lateral^ ; zygomata converging less anteriorly than in goethalsi, and 

 maxillary root in plane of ventral surface of skull ; jugal without hook- 

 like posteroventral process, or conical posterodorsal projection ; nasals 

 long, broad, and posteriorly truncate; dorsal spines relatively short 

 and weak ; and soft hairs of dorsum giving dark reddish-orange mass 

 effect (between Burnt Sienna and Sanford's Brown of Ridgway, 1912, 

 Color Standards and Color Nomenclature), with black middorsal 

 stripe from snout to base of tail. For measurements see table I. 



Specimen examined. — The holotype. 



