24 



ANOMODONTIA. 



Dicynodon testudiceps, Owen' . 



Founded upon a small and imperfect cranium characterized by 

 the extreme shortness and abrupt deflection of the muzzle, the 

 relatively large size of the nares, and the almost vertical direction of 

 the ridges on the palatal aspect of the premaxillae. The parietal 

 region was probably of the type obtaining in the next species ; but 

 it does not appear that the latter is the adult of the present species, 

 which is from a higher horizon. 



Hah. South Africa. 



47051. The anterior two-thirds of the cranium in an imperfect 

 (Fig.) condition; from the Stormberg 2 beds of the Karoo system 

 on the Modder tributary of the Orange river 3 . The type ; 

 described and figured by Owen in the ' Trans. Geol. Soc' 

 ser. 2, vol. vii. p. 71, pi. v., and also in his ' Catalogue of 

 the Fossil Eeptilia of S. Africa,' p. 46, pi. xliv. figs. 1, 2, 

 where it is said to be from the Tarka (Tacka) prolongation 

 of the "Winterberg. In the former figure the palatines 

 (21) are rightly determined, but in the latter they are not 

 marked, and the anterior prolongations of the pterygoids 

 are lettered as the maxillge (20). A transverse section 

 has been made through the right tusk. 



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



Dicynodon tigriceps, Owen 4 . 

 Syn. Dicynodon baini, Owen 5 . 



Cranium with comparatively short and deflected muzzle, large 

 triangular and lateral orbits, short and wide parietal bar, very wide 

 temporal fossae, upper part of occiput inclining forwards, bone of 

 posterior portion of temporal arcade expanding into a broad hori- 

 zontal plate, and the tusks directed mainly downwards. 



The nasals form prominent projections above the comparatively 

 small nares, and the postorbital bar is inclined backwards. 



Hah. South Africa. 



36235. The cranium of an adult individual, imperfect anteriorly ; 

 (Fig.) from the Beaufort 6 beds of the Karoo system of the Gonzia 



1 Trans. Geol. Soc. ser. 2, vol. vii. p. 71 (1845). 



2 See Quart. Journ. Geol. Soc. vol. xxiii. p. 144. 



3 See Trans. Geol. Soc. ser. 2, vol. vii. p. 58. 



4 Trans. Geol. Soc. ser. 2, vol. vii. p. 233 (1856— read 1855). 



5 Cat. Foss. Kept, of S. Africa, p. 36 (1876). The name also occurs in 

 Trans. Geol. Soc. ser. 2, vol. vii. p. 76 (1845), but with insufficient description. 



u See Quart. Journ. Geol. Soc. vol. xxiii. p. 143. 



