70 Annals of the South African Museum. 



the intercoronoid, and the precoronoid. Unfortunately the bones 

 of the lower jaw in this specimen are somewhat crushed ; but, 

 except for a possible line of suture between a precoronoidal portion 

 and the remainder of the bone, I am unable to distinguish the three 

 elements each from the other. Moreover, the whole series of coro- 

 noidal teeth is evenly distributed ; no portion of the upper surface 

 of the bone bears an augmented share, and none is without teeth, 

 whereas in the figure given by Williston of the jaw of Trimerorachis 

 alleni the " coronoidal " teeth are grouped in three well-defined areas, 

 the edges of the upper surface of each of the three elements being 

 non-dentigerous. 



The lower jaw is of much more slender build than that of Eryops 

 or of Trimerorachis, and the supra-Meckelian fossa considerably 

 smaller in proportion. Viewed from within, the posterior flattened 

 expansion of the prearticular completely hides the fossa and sur- 

 angular from view. 



A fragment of the right jaw shows what is apparently a distinct 

 suture between the splenial and the postsplenial, the latter of 

 which is the preangular of Broom. This suture occurs below the 

 front margin of the small anterior fossa. 



EHINESUCHUS SENEKALENSIS (v. Hoepen). 

 (Plate XII., figs. 1, 2.) 



1911. Myriodon senekalensis, van Hoepen. Ann. Transvaal Mus. 

 iii., 2, p. 103 ; pis. 1, 2. 



1912. llliinesuchus major, Broom. Trans. Geol. Soc. S. Africa, xiv., 

 p. 79 ; pi. xiii., 1-2. 



The types of van Hoepen and Broom were obtained at Senekal. 

 From the same place came the almost perfect specimen now in the 

 Bloemfontein Museum, which I was able to examine by permission 

 of the authorities of that Museum, and of which a cast was made for 

 the South African Museum. In addition there is in the South 

 African Museum a portion of the left mandible and the left maxilla 

 of the same species, also from Senekal, presented by the late H. 

 Kynaston, Esq. 



The following description of the species is based mainly on the 

 Bloemfontein specimen. This shows the whole of the upper side of 

 the animal crushed flat on a slab of sandstone, together with some 

 of the ventral armour. The front legs lie bent backwards along the 

 sides of the body, while the hind legs are spread out at right angles 

 to the trunk. Unfortunately the sutures of the skull can scarcely 



