DICYNODONTID^:. 



45 



Genus CISTECEPHALUS, Owen 1 . 



Typically the skull much depressed, and in some instances, at 

 least, with a pair of tusk-like maxillary teeth ; a very wide parietal 

 bar ; and the orbits directed to a great extent frontally. Nares 

 subterminal, and considerably in advance of orbits ; prsemaxilke 

 very short ; nasals longer. 



The width of the parietal appears always to exceed that of the 

 interorbital bar. All the species appear to have been of compara- 

 tively small size. In the type species the contour of the skull 

 recalls that of the Labyrinthodont Brachyops. 



Pig. 12. 



Cistecephalus microrhinus. — Frontal and occipital aspects of the imperfect 

 cranium ; from the Karoo system of the Cape. |. pa, parietal ; ip, 

 interparietal; pt.f, postfrontal ; fr, frontal; prf, prefrontal; na, nasal; 

 sq, squamosal ; so, supraoccipital ; eo, exoccipital ; bo, section of basi- 

 occipital. 



1 Oat. Foss. Eept. S. Africa, p. 63 (187Q).—Kistcccpkalus. 



