New Fossil Beptiles. 33 



process as in ordinary Therocephalians. The angular and sur- 

 angular are well developed, and between them and the dentary is 

 a large foramen as in Anomodonts. 



The shoulder girdle is sufficiently preserved to reveal all the 

 important features. Though the anterior part of the interclavicle 

 is hidden by the precoracoids, enough is seen to show that in front it 

 was an expanded plate with the lateral portions probably nearly as 

 deep antero-posteriorly as the precoracoids. The posterior part of 

 the interclavicle is flat and much broader than is usual in reptiles. 

 The clavicles are imperfectly preserved, but are apparently flattened 

 considerably in their inner halves and overlap the anterior part of 

 the interclavicle. The coracoids are well developed and typically 

 Anomodont in structure. The precoracoids are about the same size 

 as the coracoids, with which they are united by suture. There is a 

 distinct foramen, which is entirely surrounded by the bone. Only the 

 bases of the scapulae are preserved in specimen A, but in specimen B 

 the greater part of the left scapula is present. The base of the bone 

 is much expanded, and the anterior part is slightly twisted as if to 

 form an acromion, but there is no distinct process. In front of the 

 lower part of the scapula there lies a bone which may be either the 

 upper end of the clavicle or the lower end of the cleithrum. It is 

 difficult to decide the question without injuring the specimen. 



The humerus is long and slender. At the upper end there is a 

 well-developed delto-pectoral ridge. In the middle the shaft is 

 nearly round. The distal quarter of the bone is flattened but not 

 greatly expanded. There is a well-developed entepicondylar foramen 

 and a feeble ectepicondylar foramen. The radius is a straight, 

 slender bone, slightly dilated at each end. The ulna is somewhat 

 more flattened, and rather longer than the radius. There is not a 

 distinct ol-ecranon process. 



The carpus is perfectly preserved in specimen A, and nearly as 

 well shown in specimen B. In the proximal row there are four 

 bones, as in almost all Karroo reptiles — viz., a large radiale, a small 

 intermedium, a large ulnare, and a fairly large pisiform. There are 

 two centralia, a large one lying distal to the intermedium and 

 between the radiale and intermedium, and a smaller one between 

 the 1st carpale and the radiale. There are five distinct carpalia. 

 The 1st and -4th are large, the 2nd and 3rd are small, and the 5th 

 still smaller than the 2nd or 3rd. 



The metacarpals are well developed, and increase in size from the 

 1st to the 4th, which latter is about twice the length of the former. 

 The 5th is about as long as the 2nd. 



The phahnges are very mammal-like in shape ; the distal ones 



3 



