678 



PROF. H. Gr. SEELET ON THE EEPTILE 



Dorsal Vertebra. 



There are two dorsal vertebrae, both a little crushed and without 

 the neural arches, which belong to such a Dinosaur. Erom the 

 more perfect of these I draw the following characters. The cen- 

 trum is 4J centim. long, with the articular ends flat, and about 

 2| centim. wide. The anterior face appears to be rather the 

 flatter and larger ; but both articular margins are a little injured by- 

 fracture. Their edges are defined by a narrow bevelled area ; the 

 body of the centrum is smooth, regularly constricted, so as to be 

 concave from back to front in every position below the neural arch, 

 and devoid of ridges. It is more constricted at the base of the 

 neural arch than elsewhere, and, except in being much more slender 

 and less deep, recalls the dorsal vertebras of Anoplosaurus. The 

 neural canal is similarly narrow. 



Oligosaurtts adeltjs, Seeley. 

 (See Biinzel, pi. vi. figs. 14, 15, pi. vii. figs. 1-4.) 



The bone which Biinzel figures (pi. vi. figs. 14, 15) and regards as 

 the right humerus of a lizard, I regard as the right scapula probably of 

 a Dinosaur ; while the specimens (pi. vii. figs. 1, 2, and 3, 4) regarded 

 as right femur and fragment of humerus of lizard, I regard, from 

 their correspondence in character and size, as probably referable 

 to the same animal, though the femur entirely wants the tro- 

 chanter which is usually seen in Dinosaurs. Taken by themselves, 

 these two bones have enough in common with lizards to account for 

 Biinzel's determination ; but if the scapula is rightly associated with 

 them, there can, I think, be no doubt concerning their Dinosaurian 

 affinities. 



Scapula, 



The scapula is a slender compressed bone 4-i- centim. long, and 

 imperfect at both ends, but not so much injured as materially to 

 affect its characters. The inner or visceral side is slightly concave 

 in length, and makes no approximation to the concave form the 

 bone has in the crocodile. This inuer surface is gently convex from 

 side to side. The posterior margin is nearly straight, becoming 

 slightly concave towards the proximal end. In adopting this no- 

 menclature I have followed the crocodilian analogies rather than 

 those of certain Dinosaurs. This posterior margin, as preserved, is 

 33 millim. long ; it is rounded, rather compressed towards the free 

 end, and somewhat obliquely flattened towards the proximal end, 

 where a slight ridge becomes developed, which extends towards the 

 articulation, giving the bone a thickness of about \ centim. The blade 

 of the scapula is moderately concave on its anterior border, which, 

 as preserved, is 3 centim. long. The width of the distal end is 

 11 or 12 millim ; in the middle the blade becomes constricted to a 

 width of 1 centim., and then expands proximally. The proximal 

 width cannot be given, on account of fracture ; but the specimen, as 

 preserved, is 17 millim. wide. The anterior margin is more com- 



