388 Annals of the South African Museum. 



the orbit from the antorbital vacuity. The limits of the prefrontal 

 are doubtful, but it seems to be a small bone wedged between the 

 lachrymal and frontal and extending forwards over the antorbital 

 vacuity. 



The frontal is a large bone meeting its neighbour in the middle 

 line to form with it the whole of the interorbital space. It forms 

 the whole of the upper border of the orbit and extends back to 

 form part of the border of the anterior temporal vacuity. The 

 postfrontal, if present, as a separate bone, is small and forms no 

 part in the formation of the orbit although it may be part of the 

 anterior border of the upper temporal vacuity. There is some doubt 

 as to its separate identity and I am inclined to consider it as fused 

 with the frontal as in Sphenosuchus. 



The jugal forms the lower border of the orbit and meets the 

 lachrymal and maxilla anteriorly. The maxilla, as preserved, carries 

 4 or 5 llattened teeth. The teeth are seen better, however, in the 

 lower jaw. 



A length of 110 mm. of the lower jaw is present, the front missing. 

 From the post-articular process the upper border rises in a regular 

 high curve, concave at first and then convex, to a point below the 

 middle of the orbit, whence it passes downwards and forwards. 

 The lower border is almost straight. The teeth carried by the dentary 



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are variable in size, large and small teeth apparently alternating. 

 The teeth are llattened with the upper halves of the anterior and 

 posterior borders serrated, as in Theeodontosaurus. The largest tooth 

 seen is 7 mm. long and 3'5 mm. broad. There are 7 serrations in 

 a distance of 4 mm. The cross-section of the tooth is an elongate oval. 

 Vertebrae. The cervical vertebrae are somewhat crushed and 

 incomplete. The later cervicals agree closely with those of Masso- 

 spondylus carinatus. The middle cervicals are very elongate, compressed 

 in the middle, with a median ventral keel in the anterior half. The 

 zygapophyses are long with very oblique articular surfaces. The 

 nt'iiral spine is thin, low and long. The transverse process is in the 

 form of a long ridge at the level of the top of the centrum. The 

 whole body of the bone is slightly curved. The most complete bone 

 gives the following measurements: 



Length of centrum .... 105 mm. 



Height of centrum , 40 mm. 



Greatest length .... 133 mm. 



Max. height (probable) ... 85 mm. 



What is probably the last cervical has a centrum 73 mm. long 



