ilASTODONSAUEID^. 149 



Capitosaurus fronto, Meyer \ 



Smaller than C. nasutus, with the facial portion of the cranium 

 shorter, and much wider at the muzzle ; orbits smaller, with the 

 axis less oblique to that of the cranium. Auditory slit apparently 

 open. 



Hab. Europe (Germany). 



36345. Slab of sandstone showing the frontal aspect of the imper- 

 fect cranium : from the Banter (Lower Trias) of Bernburg, 

 Northern Germany. The right orbit is preserved, but the 

 left orbital region is crushed in and concealed by matrix. 

 This specimen appears to agree very closely with the im- 

 perfect posterior portion of the cranium from the same 

 locality figured by Meyer in the ' Palgeontographica,' vol. 

 vi. pi. xxviii. fig. 2, as the type of this species. The differ- 

 ence in the length of the muzzle from that of C. nasutus 

 is apparent by comparison with the small specimen No. 

 36346 ; thus in the latter the interval between the orbit 

 and extremity of the muzzle is 0,175, against 0,150 in the 

 present specimen; the two skulls being approximately 

 equal in size. Purchased, 1862. 



Capitosaurus robustus, Meyer 2 . 



Syn. Mastodonsaurus robustus, Quenstedt 3 . 

 Cyclotosaurus robustus, E. Fraas 4 . 



The type of Cyclotosaurus. Of very large size, the length of the 

 cranium being about 0,610. Auditory slit converted into a foramen 

 by the junction of the epiotic with the supratemporal ; cranium 

 comparatively short and broad, with a blunt, rounded muzzle, and 

 relatively small orbits. Epiotics extending behind line of condyles. 

 Interclavicle long and diamond-shaped, without distinct lateral 

 wings. 



A nearly entire skull is figured by E. Eraas in the 'Palaeonto- 

 graphica,' vol. xxxvi. pis. ix., x., from which the woodcut on the 

 next page is drawn. 



Hab. Europe (Germany). 



1 Palaeontographiea, vol. vi. art. 6, p. 229 (1856). 



2 In Meyer and Plieninger's ' Palaontologie Wiirttembergs,' p. 11 (1844). 



3 Mastodonsaurier im griinen Keupersandsteine Wiirttenibergs (18501. 



4 Palaeontographiea, vol. xxxvi. art. l,p. 121 (1889). 



