Mr. D. M. S. Watson on Dicyjioeloii lialli, sp. n. 95 



is, liowever, certainly in error in suggesting that the lizard 

 postfrontal has fused with the postorhitil ; in many lizards 

 both bones arc present, the former l)ciiig always very small 

 and obviously disappearing, and, so far as I know, always 

 excluded from the Iwrder of the temporal fossa — a strange 

 character in which the lizards resemble the Therapsids. 



It is very doubtful if the upper temporal bone in Stego- 

 cephalia and early reptiles, which is usually called supra- 

 temporal, can retain that name. The original use of the 

 term supratemporal was by Bakker in Cuvier and Valen- 

 ciennes' Hist. Nat. des Poissons, t. i. p. 388 (1828), for a 

 bone and the skull of a modern Teleost. The homologies of 

 this bone, and, in fact, of most others in the Teleostean 

 skull, are very doubtful, and it seems inadvisable at present 

 to a|)ply it to any bone in the Tetrajjod skull. 



Broom has proposed to use for the bone in Stegocephalia 

 Owen's term supra-squamosal. This term is very suitable in 

 itself, but, unfortuuately, was applied by Owen to the 

 squamosal of Archeyosaurus. 



In Ichthyosaurus the name " supratemporal " was applied 

 to the inner bone in the temporal region. I am, however, 

 inclined to believe, from its relations as determined by 

 Andrews in Ophthalmosaurus, with which Ichthyosaurus is 

 shown by many specimens to agree, that this bone is really 

 the squamosal. 



This view has the great disadvantage of leaving unexplained 

 the outer temporal element. 



EXPLANATION OF* PLATE VI. 



Skull with mandible in articulation and anterior part of the body of the 

 Ijritish Museum skeleton of Fleurosaurus goldfussi, v. Meyer 

 (37008). X 1. 



XIV. — Dieynodon halli, sp. n., an Anomodont Reptile from 

 South Africa. By D. ]\1. S. Watson, M.Sc., Lecturer in 

 Vertebrate Pakeontology at University College, London. 



0\ the farm Kuils Poort, F. C. Xiew veldt II,, Dist. Beaufort 

 West, Cape Province, which has already yielded the types 

 ot several new species of fossil reptiles from the Cisto- 

 cephalus zone of Upper Permian age, I was so fortunate as 

 to find most of the skeleton of a medium-sized Dieynodon in 



