New Fossil Beptiles. 39 



suchus primcevtis shows a little resemblance to Theriodesmus in the 

 limb bones, and the latter may belong to the same family, but 

 Theriodesmus is considerably larger than Ictido suchus, which is 

 about the size of Arnognathus, and therefore even if future research 

 shows thdX Arnognathus parvide7is belongs to the genus Theriodesmus, 

 which I think improbable, the species are undoubtedly different. 



Close to the jaw on the same slab is the head of a rib which may 

 belong to the same individual. It is markedly double-headed. 



Heleosaurus scholtzi, g. et sp. nov. 



Another of the interesting forms discovered by Mr. Scholtz is the 

 greater part of the skeleton of a lizard-like reptile. The remains 

 are considerably crushed, but represent much of the skull, most of 

 the presacral vertebrae, the shoulder girdle, pelvis, and portions of 

 the hind limbs. The counter slab of the anterior half of the animal 

 was obtained. Though one might expect the whole of the anterior 

 part of the skeleton to be preserved, the skull is so crushed that 

 little can be made out with certainty about its structure. The 

 anterior limbs are quite absent, though both sides of the shoulder 

 girdle are present and almost in position. 



The skull is triangular in shape, and apparently about twice as 

 long as broad, the lower jaws giving a fair indication of the shape 

 aird length. The structure of the mandible cannot be satisfactorily 

 made out, but the back part has had a large cavity as in most 

 reptilian jaws, while the front portion has been long and slender. 

 A fairly large cranial bone has been displayed which looks like a 

 frontal. If this determination be correct the' frontal region must 

 have been broad. There is pretty clear evidence of an inferior 

 temporal arch formed by the quadrato-jugal and jugal. Another 

 determinable fragment is a small portion of an elongated slender 

 maxilla with a few teeth. The teeth are flatted and serrated like 

 miniature reproduction's of those of many carnivorous Dinosaurs. 

 The palate is better preserved, the pterygoids being nearly perfect. 

 They are large, flat bones, very similar in shape to those found in 

 Proterosuchus, and like them carry many small teeth. 



The structure of the cervical vertebra cannot well be seen, but 

 there is a very distinct neck of 6 or possibly 7 vertebrae. Only 

 the bodies are displayed, w^hich are longer than broad, and very 

 markedly keeled. There are w^ell-developed intercentra, and fairly 

 large, broad cervical ribs. The dorsal vertebree are probably 15 

 in number, and they are about as broad as long. The spines are 

 short. The dorsal vertebrae and probably the others are distinctly 



