.Mr. D. jM. 8. Watson on Dicynodon lialli^ sp. n. 07 



The skull is likewise of interest, because it shows quite 

 indubitably the presence of a tabulare as a small bone ou the 

 posterior surface overlapping the posterior ends of the parietal 

 and postorbital and the anterior end of the squamosal. Its 

 inner border is in contact with the interparietal, and its 

 outer border does not reach down outside the post-temporal 

 fossa to the paroccipital, but ends far above it. 



The lower jaw of this individual served as the foundation 

 of my acconnt of that of the genus [Ann. & Mag. Nat. Hist. 

 ser. 8, vol. X. p. 576, fig. 2 (1912)]. The suture between the 

 dentarv and coronoid shown in that figure is clear as a very 

 fine dark line in this specimen and in several others in the 

 British .Museum, but I have never been able to see a clear 

 distinction of the bones in section, aTid the apparent sutur^.* 

 is, perhaps, something else ; it might, for example, mark the 

 lower edge of the horny beak. 



I intend to describe the rest of the skeleton in detail on 

 another occasion, but take this opportunity of pointing out 

 that the interclavicle is wide and not in the least T-shaped, 

 and that, as is clearly shown by many specimens in the 

 British Museum, there is no symphysis between the two 

 pubes and the two ischia in Dicynodon. 



A large series of specimens collected in association by 

 Mr. T. Bain at Tafel Berg, Niewveldt, which I found in the 

 British Museum collection, are all obviously Dicynodon micro- 

 trema, Seeley, and show individuals of both sexes and all 

 ages. The males are provided with large tusks, the females 

 are toothless, and have in consequence rather more delicate 

 faces. Young individuals, about half the size of the adult, 

 have a series of small teeth in the maxilla and dentary 

 inserted in a characteristically Endothiodont way. 



For the new species represented by the magnificent 

 skeleton of a female which is shortly described above I pro- 

 pose the name oi Dicynodon halli, sp. n., after Mr. K. Plall of 

 the British ^Museum, as a slight token of my indebtedness, 

 and, in fact, that of all palaeontologists, to him for the exquisite 

 skill and infinite patience with which he has prepared nearly 

 the whole of the great collection of South African fossil 

 reptiles in the British Museum. Only those who have 

 personal experience oE the intractability of the matrix of 

 many South African specimens can fully understand in how 

 large a degree our knowledge of these animals depends ou 

 his work. 



Ann. <& Maq. X. Hist. Ser. 8. Vol. xiv. 



