from the M'lgnesian Conglomerate of Bristol. 221) 



Vertebrae. — Tlie vertebras (fig. 2) are too long for the two 

 species of Thecodontosaurus occurring at Bristol. Both centra 

 are similar to those of SteqanoUins Rohertsoni^ Huxley, from 

 Elgin (Pal. u. geol. Abhandl. vi. (x.) 1<J02, p. 63, fig. 76). 

 They are proximal caudal vertebrae. One of them is 30 mm. 

 long and 25 mm. high, tiie other is 48 mm. long and 23 mm. 

 high. Botli articular faces are slightly concave. There are 

 low prsezygapophyses preserved. These vertebras are in the 

 possession of the Yale University Museum, New Haven, 

 Conn., U.S.A. 



Hcemapophyses. — In the Bristol Museum (no. 30) is a 

 proximal hasmapophysis (fig. 3). It is widely bifurcated and 

 had probably two separated articular faces. The distal 

 extremity is broken off. 



mm. 



Preserved length 40 



Greatest diameter from one proximal ramus to 



the other .30 



Length of the clasp, anterior side 16 



,, „ posterior side 30 



Transverse diameter of the clasp U 



Humerus. — Tlie writer has already described one humerus 

 (Pal. u. geol. Abhandl. vi. (x.) 1902, p. Q>-2, fig. 75), and in 

 the British Museum is a second one. Both are right humeri. 

 That in the British Museum (fig. 4) is incomplete at the 

 distal end, but it is larger than the humerus (fig. 5) in the 

 Bristol Museum (nos. 1)5 & 96). The anterior aspect of the 

 proximal end is not visible in both humeri ; therefore the 

 length of the processus lateralis is unknown. The proximal 

 and distal ends have the same breadth. Tlie median border 

 is strongly incurved, the lateral one is nearly straight. 

 Besides tlic condylus lateralis is a broad and sharp-edged 

 ectepicondylus. The caput humeri is broken otf in both 

 specimens. 



Bristol Brit. Miis. 

 specimen. specimen, 

 mm. mm. 



Total length 170 (?) l!)0 (pre- 



served 150) 



Width at proximal end 5.5 (? GO) 7-5 (80 '^) 



„ distal end 50 (? GO) 



Diameter in the middle of shaft . . 'lO 2'i 



Radius. — A bone in the Bristol Museum (no. 52) is to bo 

 taken as the radius (fig. G). It is not quite complete at both 

 extremities. The thicker end is the distal one: it shows a 



