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ON TWO NEW THEEOCEPHALIAN EEPTILES (GLANO- 

 SUCH.US MACBOPS AND PBISTEBOGNATHUS BAINI). 



By E. Bkoom, M.D., B.Sc, C.M.Z.S., Victoria College, Stellenbosch. 



(Eead March 30, 1904.) 

 (Plate VI.) 



Glanosuchus mackops, g. n. et sp. n. 



This new genus and species is founded on a fairly complete skull 

 discovered by Mr. Snyman at Knoflok's Fontein, near Van der Byl's 

 Kraal in the Gouph. It is the skull of a moderately large Thero- 

 cephalian reptile with the teeth fairly well preserved and with the 

 greater part of each mandible in position. The specimen has been 

 subjected to a considerable degree of pressure, which has not only 

 produced some distortion but has made the bone in some parts 

 extremely brittle. In addition to this the bone, except in parts that 

 are much weathered, is so like the matrix that in one or two 

 regions one is unable to say with certainty what is bone and what 

 matrix. It is thus impossible to give as complete a description 

 of the skull as one should like, and in the figures of the skull I have 

 been obliged to depart from my usual practice of only drawing what 

 is bone. 



The skull bears some little resemblance to one or two of the 

 already known Therocephalians, especially Scylacosaurus, Scymno- 

 saurus, iElurosaurus, and Pristerognathus, but its dentition shows 

 it to be distinct from any of those genera. From the occipital 

 condyle to the front of the snout the skull measures almost exactly 

 12 inches, and the greatest width across the temporal arches has 

 probably been about 6 inches. The snout is moderately long and 

 powerfully developed, with the nostrils directed more forwards than 

 outwards. The orbits are relatively rather -small, and are situated 

 behind the median transverse plane. The temporal fossie, though 

 imperfect, have probably extended back beyond the plane of the 



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