114 Huene and Lull — Tr lassie Rejdilt IIall<>j>}is. 



-mm 



Length of caudal centra '. . 



Height of caudal centra 5 



From centro-neural suture to top of neural spine 



(in the 3rd of these vertebras) 10 



Ribs and Hcemapqphyses. — There are several dorsal ribs ; 

 one of them shows the proximal extremity with two widely 

 separated heads, as in the Dinosauria. The longest rib lying 

 in the rock near the scapula and tibia is 33 mm in length with- 

 out proximal end. One hsemapophysis, or chevron bone, lies 

 below the preserved caudal vertebra ; it is marked b} 7 length 

 and slenderness. The opening is very long ; both branches are 

 connected by a clasp. 



Length (probably not complete) of hsemapophysis, 32 mm 

 Width at articular face (only half of it preserved) 6 



Width of the foramen 3 



Length of the foramen 9 



Thickness of the distal end of hsemapophysis 1*2 



Scapula. — An isolated and peculiar-shaped scapula lies 

 beneath the complete hind leg. We think it is quite complete 

 and resembles most nearly that of Erpetosuchus. The extrem- 

 ity having a halfmoon-like depression, taken by Marsh as the 

 articular cavity (glenoid fossa), we consider the distal end. 

 At the other end of the bone is a narrow and thin but high 

 process which we take as processus deltoideus scajoulw. It is 

 very similar to that of Erpetosuchus. At the other edge of 

 the same extremity is the articular face, Here and at the 

 distal extremity the bone is thicker than in other places. 

 What Marsh took for the articular end we think cannot be 

 that, because there would be no space for the articulation with 

 the coracoid. 



Length of scapula from 2^'ocessus deltoideus to 



upper corner of distal end . 28 mm 



Length of scapula from articular face to lower 



corner of distal end ...- '. 24 



Width from articular face to processus deltoideus, 12 



Width at distal end 10-5 



Width at narrowest place 4-5 



Humerus. — In one corner of the larger slab is an impression 

 which Marsh took for that of the humerus. He is possibly 

 right, but it could also be the impression of the distal end of 

 the second pubis. 



Radius, Vina and Manus. — The forearm with the manus 

 of one side is still nearly in connection, lying beside the 

 crushed tibia. The ulna is thicker than the radius, the latter 

 being very thin. 



Length of radius, 28 E 



Length of ulna, 29 



j mm 



