22 ANOHODONTIA. 



directed somewhat frontally ; parietal bar long and narrow, with 

 large foramen ; temporal fossas of moderate width, and the hone of 

 the temporal arcade comparatively narrow ; occiput nearly vertical ; 

 tusks directed mainly downwards. On the palate the premaxillary 

 ridges are inclined downwards and forwards. 



The young skull which was made the type of the provisional 

 species B. duhius agrees so well in characters with the type of the 

 present species that it is probably not separable. 



Dicynodon simocephalus, Weithofer 1 , is founded on an imperfect 

 cranium having a marked resemblance to the type of B. pardiceps, 

 but with a more inclined tusk. 



Hob. South Africa. 



47045. The nearly entire cranium ; from the Beaufort beds of the 

 {Fig.) Karoo system near Eort Beaufort. The type ; figured by 

 Owen in his ' Catalogue of the Fossil Eeptilia of S. Africa,' 

 pis. xxxviii., xxxix., and also by Seeley in the 'Phil. 

 Trans.' for 18S9, p. 244, fig. 2. The bones marked 

 maxillae (20) in Owen's figure are the anterior prolonga- 

 tions of the pterygoids, with the palatines on their inner 

 sides. On both sides the suture between the premaxilla 

 and maxilla is distinctly shown; but the sulcus on the 

 left side of the premaxilla, which in Seeley's figure is 

 regarded as a suture forming the anterior border of an 

 ' infranasal ' bone, if anything definite, is probably the im- 

 pression formed by the junction of two horny shields. 



Presented by A. G. Bain, Esq., 1875. 



47048. The imperfect and crushed muzzle of a larger cranium pro- 

 bably referable to this species ; from the Karoo system of 

 the Graaf-llcinet district, on the southern flank of the 

 Sneewberg range. Noticed by Owen on p. 35 (No. 57) of 

 his ' Catalogue,' as B. leoniceps. The contour of the 

 muzzle appears to be exactly the same as in the type of 

 the present species, but the alveolar margins of the jaws 

 are broken away. The section of the tusk is slightly 

 elliptical. Presented by A. G. Bain, Esq., 1853. 



47054. A young skull probably referable to this species ; from the 

 {Fig.} Graaf-lleinet district. The type of B. dubius, figured by 

 Owen, op. cit. pi. lxix. figs. 1, 2. A fracture and disloca- 

 tion have disturbed the relative positions of the occipital 

 and parietal planes. The tusk, which has only just pierced 

 the jaw, has an elliptical section. The general contour 

 1 Ann. IJofinus. Wicn, vol. iii. p. 1 (1888). 



