DICYNODONTIDiE. 35 



' Catalogue of the Fossil Kept ilia of S. Africa,' pis. xlv., 

 xlvi. fig. 1. The orbits have been somewhat flattened by 

 crushing. The occipital region of this specimen is shown 

 in woodcut, fig. 6. 



Presented by Sir George Grey, K.C.B., 1858. 



Ptychosiagum latirostris (Owen 1 ). 



Syn. Ptyclwgnathus latirostris, Owen 2 . 

 (?) Ptychognathus alfredi, Owen 3 . 

 (?) Ptychoynathus depressus, Owen 4 . 



Allied to the type species, but the parietal- ridges of the inter- 

 parietal separated by a wider interval, which is not distinctly chan- 

 nelled ; fronfcals apparently without distinct tubercles ; maxillae 

 laterally emarginate for a short distance in front of the orbits ; 

 muzzle very wide. 



Bab. South Africa. 



35222. The imperfect skull ; from the Beaufort beds of the Karoo 

 {Fig.) system of the llhenosterberg branch of the Sneewberg 

 range. The type; described by Owen in the 'Quart. 

 Journ. Geol. Soc' vol. xvi. p. 51, and figured by the same 

 writer in the « Phil. Trans.' for 1862, pi. xxi. fig. 1, and 

 also in his ' Catalogue of the Fossil Reptilia of S. Africa,' 

 pi. xlvi. fig. 2, pi. xlvii., and pi. xlviii. fig. 2. The shape 

 of this specimen has been but little altered by crushing. 

 The flattened inferior, surface of the mandibular symphysis 

 characteristic of the genus is well shown. 



Presented by Sir George Grey, K.C.B., 1858. 



47064. A flattened skull, apparently referable to this species ; from 

 (Fig.) the Karoo system of Styl-Krantz 5 , on the flanks of the 

 Sneewberg range. The type of Ptyclwgnathus depressus ; 

 figured by Owen in his ' Catalogue,' pi. li. This specimen 

 has been flattened from above downwards, its contour 

 being precisely what might be expected if the preceding 

 specimen had been subjected to the same process. 



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



Quart. Journ. Geol. Soc. vol. xvi. p. 51 (I860).— Ttychognat hus. 



2 Loc. cit. 



3 Phil. Trans, for 18G2, p. 456. 



4 Cat. Foss. Kept. S. Africa, p. 53 (1876).— Preoccupied bf Fischer, see 

 p. 37. 



5 Some of the higher beds at Styl-Krantz may belong to the Stormberg group, 

 see Quart. Journ. Geol. Soc. toI. xxiii. p. 143. 



D2 



