NEW CARNIVOROUS THERAPSIDS. 



167 



The lower jaw is slender, with a low symphysis. There appear 

 to be three incisors occupying a space of 6 "5 mm. In the speci- 

 men it looks as if there were four incisors, but the front one is 

 probably the first incisor of the right jaw. The canine is 

 unusually small. The total length from the first incisor to the 

 last molar is 30 mm. 



The nearest ally to Cerdodon tenuidens is Ictidosuchus primcevus, 

 described by me fourteen years ago. I think there is little doubt 

 but that the two belong to the same family of Therocephalians — 

 the Ictidosuchida?. 



The British Museum Eegister number of the specimen is 

 49420. 



Cy/niscodon lydekkeri, gen. et sp. n. (Text-fig. 4.) 



This new genus and species is founded on an imperfect right 

 dentary discovered by Mr. T. Bain at " Palmietfontein, Cape 

 Colony." There are many Palmietfonteins in the Karroo, but it 

 is probable that the specimen is from the Palmietfontein in the 

 Beaufort West district, and in the Pareiasaurus zone. 



Associated with the jaw is much of the skeleton of a small 

 Dicynodon. There is a large part of the skull, including most of 

 the occiput, much of the left squamosal and most of the left 

 orbital region, and much of one mandible. There are a series of 

 vertebra?, the right scapula, parts of the sacrum, and much of the 

 right side of the pelvis. 



Text- figure 4. 



Cyniscodon lydekkeri. 



A. Side view of right dentary. B. Upper view of right dentary. Both nat. size. 



B.M. 494,09. 



The specimens were examined by Lydekker and described 

 by him in the British Museum Catalogue of Fossil Reptiles, 

 vol. iv. p. 72, all the specimens being supposed to belong to one 

 individual. The dentary with teeth is in the same matrix, and 

 was probably picked up near the small Dicynodon skeleton, such 

 an association of bones being by no means uncommon in the 

 Karroo. 



The dentary was thought by Lydekker to belong possibly to 

 Cynoauchas suppostas Owen, to which it unquestionably has much 



