26 



MEMOIRS OF THE QUEENSLAND MUSEUM. 



taking these bones and noting the bulk of material at the symphysis of the 

 coraeoid with the scapulo-precoracoid, it will be seen that in Chelone mydas there 

 is relatively a far greater depth of bone behind the glenoid cavity. 



Two fragments of the bars themselves were found, one being the distal end 

 of the scapular and the other the corresponding portion of the precoracoid. In 

 their relative proportions these present differences from their living associates. 



Fig. 1. — Cratochelone bemeyi. Left Shoulder Girdle ; upper view of remains. 

 Cor, coraeoid ; PC, precoracoid ; Sc, scapular. 



Del. C. 31. liossi/rr. 



The scapular fragment has a maximum width of 100 mm. (contours abraded), is 

 38 mm. thick, and the length to the fracture is 200 mm. Compared with 

 that of C. mydas it is relatively much thicker. These proportions are reversed in 

 the termination of the precoracoid, which is relatively wider and thinner. 



Humerus. — The portion preserved consists of the proximal end of a left 

 humerus with the head and mesial process or ulnar crest. The subhemispherical 

 head is set somewhat obliquely; the portion overhanging the intertubercular 

 fossa is considerably in excess of that on the outer side and the neck is here 

 marked by a sharply defined concavity immediately below the articular surface. 

 As in Chelone mydas, the head is greatly expanded transversely in correspondence 

 with the glenoid facets of the coraeoid and scapulo-precoracoid. Although the 

 head itself is relatively less deep, the proportions of the whole bone are here very 

 similar to those of the green turtle, the maximum diameter of the head being 

 three-quarters of the maximum diameter of the bone {i.e., surface of head to 

 outer margin), the comparative shallowness of the head being made up by the 

 width of the shaft at the base of the mesial process. Unfortunately, the extreme 



