. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 62 Annals of the South African Museum. The squamosal is a somewhat reduced bone which overlaps the jugal in front and passes inwards between the parietal and tabular. On the occipital plate there is a small interparietal and a larger supraoccipital which forms the upper margin of the post-temporal opening. The lower jaw is slender with a Therocephalian type of mentum. The full dentition is not visible, but there is a large canine correspond- ing with that in the upper jaw. The jaw is mainly composed
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 62 Annals of the South African Museum. The squamosal is a somewhat reduced bone which overlaps the jugal in front and passes inwards between the parietal and tabular. On the occipital plate there is a small interparietal and a larger supraoccipital which forms the upper margin of the post-temporal opening. The lower jaw is slender with a Therocephalian type of mentum. The full dentition is not visible, but there is a large canine correspond- ing with that in the upper jaw. The jaw is mainly composed of dentary, which has a long, strongly developed coronoid process. The outer face of the dentary is furnished at the hinder lower corner with a strong boss, on to the lower hinder side of which the angular overlaps. Above the boss the bone is furnished with a longitu- dinal groove. The inner face of the dentary is grooved for the reception of the splenial. The angular shows, externally, a large oval surface which is corrugated and has a notch in its lower border. The coronoid process of the dentary is crushed down on to it so that no surangular shows. The articular is crushed out of posi- tion and now lies partly within and partly below the angular. It has a saddle-shaped articular surface which is still in partial contact with the displaced quadrate. The chief features of the posterior Fig. 7.—Dorsal view of type skull half of the imperfectly displaved pal- of Choerosaurus dejageri gen. et ate are the shortness of the pterygoid- vomerine bar, the small suborbital vacuity, and the large pyriform interpterygoid vacuity. In these features the genus agrees with Ahidnognathus and other Scalopo- saurids. Pelvis.—Associated with the type skull of Choerosaurus dejageri was found an almost complete pelvis with the articulated proximal part of a left femur. At first I thought that the pelvis was too large to be part of the same skeleton as the skull; but, as in the Gorgonopsian. Ple
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
