692 



S. W. WILLISTON 



% 





•^ 



above described. Its size and slenderness seem disproportionate to 

 the massiveness of the humerus, but that it belongs with the pelvis 

 and humerus there can be scarcely a shadow of doubt. It has a 

 thickened articular end below, a part of which is missing — that which 

 protruded from the face of the cliff and led to the discovery of the 



specimen. Doubtless there 

 was another facet here for the 

 coracoid. The upper part is 

 expanded and flattened, with 

 the anterior border thickened, 

 the inner surface somewhat 

 concave. This thickened 

 anterior part is continued into 

 an elevated ridge on the dor- 

 sal side, which ends rather 

 abruptly near the lower 

 extremity — the acromion. 



Pelvis (Fig. 4). — The bones 

 which, because of their shape, 

 must belong to the left side 

 of the pelvis, from the position 

 in which they were found and 

 from certain peculiarities of 

 their shape, were first thought 

 to belong with the pectoral 

 girdle, and it was not until the specimen had been nearly com- 

 pletely reconstructed that its real nature was apparent. The most 

 remarkably dilated and elongated anterior part of the iHum, had it 

 not been so strongly curved, would rather represent the blade of the 

 scapula, and no articular surfaces for the attachment of the sacral 

 ribs have been detected — there are certainly none such low down on 

 the bone. 



The united ischium and pubis were slightly separated from the 

 iHum on the left side, and entirely so on the right side. The con- 

 necting surfaces were so incrusted with the tenaciously adhering 

 matrix that their sutural nature is not apparent, though without doubt 

 the separation took place at the suture, since the united ischium and 

 pubis of the opposite side have the same shape. 



Fig. 4. — Left innominate bone of 

 Euhrachiosaurus browni. 



