242 



CASE. 



[Vol. II. 



The clavicles are peculiar bones with spatuliform enlarge- 

 ments at either end ; the ventral ends lie flat upon the inter- 

 clavicle and coracoid ; the dorsal end lies at an angle of about 

 forty-five degrees to the ventral ; the shaft is much smaller and 

 has a triangular section ; it is so bent that the two ends of the 



bone are directed at about 

 a right angle to each 

 other. There is no trace 

 of any cleithrum (Fig. 6). 

 The scapula and the 

 coracoid are united into 

 a single bone, and there 

 is no trace of any suture 

 between them ; the coty- 

 lus for the humerus is 

 deep, and . the rim is 

 prominent above and 

 below. The edges are 

 complete, with no traces- 



Fig. 6.— Ventral view of anterior dorsal series, showing of any foSSaC Or SCrra- 

 pectoral girdle and humerus. . _,, 



tions. Ihere is no trace 

 of any coracoid foramen. The outline of the bone is very 

 characteristic, as there is a complete absence of the posterior 

 prolongation of the scapula; it is much more like the form 

 found in the amphibians of the same period (Fig. 6). 



The lower surfaces of the vertebrae in the sacral region are 

 covered by the remnants of the pelvis. The anterior ends of 

 the ilia are broken away, but a separate fragment shows that it 

 was rounded rather than acuminate ; the distal end joined the 

 proximal part by a rather slender neck. The ischium and the 

 pubis were joined on the middle line and extended far anterior 

 and posterior to the acetabulum. The acetabulum is rather 

 large, and was imperforate. All three bones take part in its 

 formation. 



The humeri of both sides are preserved in an imperfect con- 

 dition ; the proximal end is expanded into a thin flat plate with 

 a scarcely distinct head ; the shaft is comparatively stout, and 

 is triangular in section ; the distal end is turned at almost a. 



