184 Albany Museum Records. 



Notice of a new Endothiodont genus (Chelyoposaurus). By R. 

 Broom, M.D., &c. 



About a year ago there was discovered in one of the Kimber- 

 ley mines a block of sandstone, containing the remains of a small 

 fossil reptile. This was sent down to Capetown to the Dirf'ctor of 

 the Geological Survey for examination, and I have been asked by 

 him to undertake the determination of the form. 



The specimen consists of the remains of a small Dicynodont 

 reptile, which, when complete, would probably be about afoot and 

 a half in length. As the bones are preserved in a sandstone rock, 

 and are very friable, very little has been possible in the way of 

 development. Almost the whole of the presacral part of the 

 vertebral column is preserved, there being remains of 26 vertebrae 

 preserved in front of three others which are evidently sacral. On 

 the right side, portions, at least, of most of the ribs are preserved. 

 The greater part of the right arm is also present, though the bones 

 of the carpus and phalanges are displaced. The left femur is almost 

 perfect. Of the skull the greater part has been lost, but there is 

 still preserved the almost complete left temporal arch, with a large 

 part of the maxilla, and the greater part of the left mandible. 



All the bones of the skeleton ai-e typically Dicynodont. The 

 skull has the usual enormous squamosal, which passes outward as 

 in Opistlioctenodon. The jugal passes far back on the underside 

 of the squamosal arch. The maxillary, so far as preserved, is very 

 similar to that in the other small Endothiodonts and in Oudeno- 

 don. It contains at least one small maxillary tooth which is not 

 a canine. The tooth seems to be quite free of serrations. 



The greatest length of the squamosal bone is 41 mm., and the 

 length of the skull when perfect would probably be about 90 mm. 



Though the skull closely resembles that of Oudenodon, 

 the presence of the small molar (the evidence does not show 

 whether there may have been others) places the form among the 

 Endothiodonts, and entitles it to be regarded as a new genus. I 

 propose to name the specimen Chelyoposaurus Williams/, after 

 Mr. Gardiner Williams. The specimen will be described at greater 

 length and figured elsewhere. 



