Palujuana Whitei — LijdroHOuruH. 3 



The postfrontal is a large bone which forms most of the post- 

 orbital arch. It articulates with l)oth the frontal and parietal, and 

 on passing outwards gives off, as in typical lizards, a posterior 

 branch, which forms in part the temporal arch, and an inferior 

 branch which unites with the jugal. 



The bone which has united the postfrontal with the upper end 

 of the quadrate is missing, l)ut its impression remains. It is the 

 element which is regarded 1iy most authors as the scpiamosal, but 

 which I am rather inclined with Baur to regard as the supra- 

 temporal. 



The squamosal which has laiii between the upper end of the 

 quadrate and the parietal has been comparatively small, as in 

 lizards generally. 



The quadrate is very large and thoroughly lacertilian in structure. 

 Its concave surface looks outwards and backwards. 



The lower jaws are very much crushed ; as in modern lizards 

 they have been loosely attached at the symphysis. The quadrate 

 appears to have formed a deeper concavity in the articular than is 

 usual in modern lizards. 



The palatal bones are crushed and displaced apparently, and 

 have not been cleared of matrix. 



So far as it is possible to judge from the skull, the affinities of 



the small lizard seem to be more with the American Iguanas than 



with other modern lizards. I have, therefore, proposed for it the 



name Paligumia Whitei^ after the discoverer of the specimen. 



Fig 1, Plate 1 : — Side view of skull of Pul 'iguana Whitei. x 2. 



Fig 2, ,, : — Top views ,, ,, ,, x 2. 



On the remains of Li/sfrtisaiirus, in the Albany Museum. — 

 By R. Broom, M.D., B.Sc, C.M.Z.S. 



As the name PtychognaUius, proposed by Owen in LS59 for 

 those peculiarly specialised Dicynodont reptiles with long 

 decurved snouts, has been pre- occupied by Stimpson for a 

 crustacean genus, it becomes necessary to adopt the name pro- 

 posed by Cope in describing a species in 1870, viz., Lystrosaurtis, 



