314 Dr. R. Broom on a new Theriodont Reptile 



XL. — On a new Theriodont Reptile (Ictidosuchus primasvus) 

 from the Karoo Beds, South Africa. By R. BEOOM, M.D., 

 B.Sc. 



In the lower beds of the Karoo formation near Pearston I 

 have been fortunate in recently discovering the remains of a 

 small Theriodont reptile of a remarkably generalized type. 

 The remains were met with in the beds of indurated shale, 

 and though, unfortunately, much of the skeleton has been 

 weathered away and irretrievably lost, sufficient has been 

 left in the rock to give a very good idea of the type. The 

 parts discovered consist of a moderately complete lower jaw, 

 a considerable portion of the maxilla with teeth, and a number 

 of other portions of the skull ; the almost perfect scapula, 

 coracoid, and precoracoid ; the humerus and radius; a femur 

 and a tibia and fibula ; two or three imperfect vertebra? and 

 ribs ; and a number of other fragmentary remains. Unfor- 

 tunately the various bones are mingled together in almost 

 inextricable confusion — the tibia and fibula lying across the 

 scapula and the femur right across the humerus — so that it is 

 a matter of great difficulty to develop the one bone without 

 injuring the other. As the form is of much interest, aud the 

 thorough examination of the remains will necessarily take 

 considerable time, 1 have thought it advisable to give a short 

 preliminary account of the animal. 



Lower jaw of Ictidosuchus primcevus, nat. size. 



The lower jaw resembles much more the Theriodont jaws 

 from the Upper Karoo beds than any of those hitherto found 



