26 
memoi:rs of the Queensland museum. 
taking these bones and noting the bulk of material at the symphysis of the 
coracoid 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. 
Fie. 1. 
Bel. C, M. RossUei 
■Grdtocheloue hevneyi. Left Shoulder Girdle ; upper view of remains 
Cor, coracoid; PC, precoracoid; Sc, scapular. 
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 6. mydas it is relatively much thicker. These proportions are reversed in 
the termination of the precoracoid, which is relatively wider and thinner. 
Ilamcrus . — 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 oblkjuely ; the portion (werhanging 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 expaiided transversely in correspondence 
Avith the glenoid facets of the coracoid and scapiflo-precoracoid. Although the 
head itself is relatn^ely less deep, Hie 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 {ix., 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 
