South African Fossil Reptiles and Amphibia. 153 



The chief measurements of the type are : 



Greatest length ..... ab. 86 mm. 



Greatest width . 56 ,, 



Snout to front of orbit . . . 18 ,, 



Length of orbit . . 20 ,, 



Interorbital width . . . 16 ,, 



Intel-temporal width (min.) . . 12 ,, 



Basal length . . 72 ,, 



Width between caniniforin processes . 26 ,, 



Type. Skull. (S.A. Mus. Cat. No. 2354.) 



Locality. Dunedin, Beaufort West, C.P. 



Horizon. Lower Beaufort Beds. (Cistecephaliis zone.) 



DICYNODON TIGRICEPS, Owen. 



1855. Owen. Trans. Geol. Soc., vii, 2nd ser., p. 233. 

 1876. Owen. Cat, Foss. Eept. S.A., p. 38. 



1876. Owen, Dicynodon baini. Cat. Foss. Eept. S.A., p. 36 ; pis. xxx- 

 xxxv (non xxxvi, xxxvii). 



1889. Seeley. Phil. Trans., 1889 B, p. 236, pi. xiii. 



1890. Lydekker. Cat. Foss. Eept. and Amphib., iv, p. 24. 



This species is doubtfully represented in the South African Museum 

 collection by an incomplete skull (No. 749) from Pearstou, C.P. The 

 front of the skull is very weathered and somewhat distorted, but the 

 occipital plate is in a good state of preservation. The basisphenoid 

 tubera are seen to project very considerably below the level of the 

 condyle, and between them the basioccipital is deeply hollowed out. 

 The paroccipital process is very massive and its lower border strongly 

 concave. The foramen jugulare looks entirely backwards, and the 

 post-temporal vacuity lies at the level of the middle of the foramen 



niaguum. 



Type. Skull in the British Museum. 



Locality. Gouzia Eiver, Kaffraria. ("_D. baini " is from Fort Beau- 

 fort, C.P.) 



Horizon. Lower Beaufort Beds. 



DICYNODON TRUNCATUS (Br.). 



1899. Broom, Oudenodon triincatus. Ann. S.A. Mus., i, p. 455 ; 

 pi. x, fig. 4. 



Founded on the crushed and weathered anterior portion of a skull. 

 Beak almost square, with median and two lateral ridges. Premaxilla 



