ign) 
ON ICTIDOSUCHUS PRIMAVUS. 
By R. Broom, M.D., B.Sc. 
(Read October 31, 1900.) 
(Plates XXVI., XXVIT.) 
Some months ago I was fortunate in discovering on the farm of 
Mr. J. Kriiger, in the neighbourhood of Pearston, the remains of a 
very interesting Theriodont. The coracoid and precoracoid bones 
were seen exposed on the hard shale which formed the bed of a small 
creek. On digging into the rock I found within a space of less than 
a square foot a considerable number of other bones. Unfortunately 
the bones have been disconnected and confusedly huddled together, 
so that it has been a matter of considerable difficulty to expose one 
bone without badly injuring another which lies across it, and the 
difficulty has been rendered the greater by the hardness of the rock 
and the brittleness of the bones. Though much of the skeleton is 
missing, I have succeeded in discovering, besides the bones of the 
shoulder girdle, not only a humerus, a radius, a femur, a tibia and a 
fibula, but also a fairly complete lower jaw and the greater part of 
the skull. 
The discovery is interesting, not only in making known a new type 
of Theriodont skull, but also in having the principal bones of the 
skeleton found in association with it. 
For the new form I have proposed the name Ictidosuchus primevus. 
SKULL. 
The skull is very imperfectly preserved, and had manifestly been 
broken at the time the remains were originally deposited, as the 
right maxillary region was found quite away from the greater part of 
the skull and no trace of the snout has been found except a small 
fragment. Fortunately sufficient of the skull has been found to give 
not only a good idea of the proportions, but also to show most of the 
external characters. The left side, with the exception of the snout, 
is fairly complete, and of the right side there is preserved in 
12 
