FOSSIL REPTILES. 627 



Browkiella africana, gen. et sp. n. ' (PL LXXIX. fig. 21.) 



In Mr. Brown's collection there are portions of at least two 

 skeletons of an animal rather larger than Euparlceria capensis 

 but closely allied to it. The only parts well preserved are the 

 shoulder-girdle, pelvic girdle, and femur. These indicate an 

 animal nearly a half larger than the better known African 

 form. 



The following measui'ements will illustrate the differences in 

 size of the two forms : — 



Euparkeria BroivnieJla 



capensis. africana. 



inm. mm. 



Width of base of scapula 15 20 



Length of coracoid 24 30 



Length of ischium 36 about 50 



Length of femur 56 74 



In general structuie there is a close similarity between the 

 bones, but those of Broioniella are more massive, and there are 

 numerous minor differences. 



The ischium differs in shape in being constricted near its 

 middle, and the pubis, besides being much broader and stouter, 

 differs in having only a single pubic foramen. This difference 

 seems of sufficient importance to justify the placing of this 

 species in a separate genus, and I have much pleasure in naming 

 it after Mr. Alfred Brown, the veteran collector, to whom Science 

 owes such a deep debt. 



Mesosuchus beowni Watson. (Pis. LXXVIII., LXXIX. 

 figs. 12-15, 23.) 



Though Mesosuchus hroumi differs considei'ably from JEujjarheria 

 and is probably not a Pseudosuchian, it has nevertheless some 

 interesting affinities, and, both from its association with Eu- 

 parkeria and from the fact of the two forms having been confused, 

 it seems well to consider the one along with the other. 



As already mentioned, Watson, in his description of Mesosuchus 

 hrowni, had regarded some of the imperfect skeletons associated 

 with it as belonging to the same form. As we now know that 

 most of these skeletons belong to the similar sized but distinctly 

 different Euparkeria capensis, it is necessary to redefine Meso- 

 suchus to some extent. 



The type specimen consists of a badly crushed skull showing 

 the premaxilla and maxilla of the left side in good condition, 

 with most of the lower jaw and most of the palate badly crushed. 

 Much of the rest of the skull is present, but so badly distorted 

 that a restoration is difficult. Of the rest of the skeleton of the 

 type individual almost the whole of the vertebral column from the 

 head to about the middle of the tail is preserved. ' Of the shoulder- 

 girdle there is practically nothing preserved, though much of the 



Proc. ZooL. Soc— 1913, No. XLII. " 42 



