Prof. H. G. Seeley on Euskelesaurus Brownii. 335 



inner to the outer digit. The great width of the superior 

 surface of the phalange best distinguishes it from the French 

 type, which in other parts of the skeleton shows differences 

 from Euskelesaurus, which probably show that the two genera 

 were not so nearly related as the aspect of the phalanges 

 might at first suggest. The length of the longest digit, 



1 • r 1 -i , ™ o 7 



exclusive ot the metatarsus, does not appear to have exceeded 

 9 inches. The corresponding measurement of the four 

 phalanges of the third digit in Dimodosaurus appears to be 

 fully 10 inches. 



On the Lower Jaw of Euskelesaurus; probably referable 

 to E. Brownii {Huxley). (Fig. 6.) 



On my visit to Aliwal North in September 1889 I ex- 

 amined, in company with Dr. W. G. Atherstone, F.G.S., and 

 Mr. Thomas Bain, under the guidance of Mr. Alfred Brown, 

 a locality on the Kraai River, to the south-east of Aliwal 

 North, which we anticipated might furnish Euskelesaurian 

 remains. The only specimens which rewarded us were found 

 on the waggon-track, lying close to the surface, and very much 

 broken, owing to their superficial position and exposure. 

 They were in hard red shale and consisted of important frag- 

 ments of the jaw and less useful fragments of vertebrae. I 

 am unable to say that the vertebrae and jaw belong to the 

 same individual, being only found within a foot or so of a 

 spot which yielded no other vertebrate fossils. 



The jaw fragments comprise the posterior articular extre- 

 mity of a lower jaw and the anterior dentary extremitv. 

 Both are quite unlike anything previously known. The 

 articular extremity shows the articular bone, hitherto unknown 

 in any Saurischian, which is massive, lying on the inner side 

 of the angular bone. This bone appears to develop a large 

 internal plate which exte ids horizontally inwards but is im- 

 perfectly preserved. There appears also to be a small sub- 

 angular bone, forming the anterior margin of the articular 

 surface, though it is possible that this appearance of suture 

 may only be a fracture. There is no indication of any coro- 

 noid process, the superior and inferior surfaces being hori- 

 zontal and parallel, and the depth of the jaw towards the 

 articulation is extremely small. 



The articulation is 4 inches wide, about 1^ inch long in the 

 middle, and somewhat longer at the sides, so that it is trans- 

 versely reniform, with the concavity on the posterior margin. 

 The surface is concave from front to back, divided into two 

 portions by an oblique median ridge separating the inner 



23* 



