204 'Transactions of the South African Philosophical Society. 



PEINCIPAL LITERATUEE. 



Owen, R. '* Descriptive and Illustrated Catalogue of the Fossil 

 Eeptilia of South Africa in the British Museum." London, 

 1876. 



Seeley, H. G. " On the Gomphodontia." Phil. Trans., 1895. 



Seeley, H. G. " On the Skeleton in New Cynodontia from the 

 Karroo Rocks." Phil. Trans., 1895. 



Broom, R. ''On Ictidosuchus primsevus." Trans. S. Af. Phil. Soc, 

 1901. 



Broom, R. " On the Structure and Affinities of Udenodon." Proc. 

 Zool. Soc. London, 1901. 



REFERENCE TO PLATES. 



Aug., angular; art., articular; c, canine; dent., dentary ; fr., 

 frontal; i., incisor; ju., jugal ; la., lachrymal; mx., maxillary; na., 

 nasal; pa., parietal; pmx., premaxillary ; pr.f., prefrontal; po.f., 

 postfrontal ; qu., quadrate; sq., squamosal; sur., surangular. 



Plate I. ■ 



Fig. 1. Right side of skull of Lycosuchus vanderrieti. x '518. 

 ,, 2. Right side of restoration of skull of ditto, x '518. 

 ,, 3. Left side of skull of Lycosuchus vanderrieti. x '518. 



Plate II. 



Fig. 4. Upper view of skull of Lycosuchus vanderrieti. x '518. 

 ,, 5. Upper view of restoration of skull of ditto, x '518. 

 ,, 6. Under view of snout of Lycosuchus vanderrieti. x '518. 

 ,, 7. Side view of canines of right side of Lycosuchus vanderrieti. 

 Nat. size. 



Addendum (December 5, 1902). — Since the above paper was 

 written I have had an opportunity of examining the Theriodont 

 specimens in the Albany Museum. The specimen which Seeley 

 took as the type of ?Cynognathus leptorhinus does not seem to me 

 to differ in any important characters from Cynognathus platyceps, 

 Seeley. The depression on the upper surface of the snout is mani- 



