494 



Annals of the Carnegie Museum. 



Measurements. 



Greatest length of ulna, 162 mm. 6^ inches. 



Greatest thickness of proximal end, 43 " i^i " 



Greatest breadth of proximal end, 56 " 2^^ " 



Pelvis and Posterior Limbs. — The well-preserved distal portion of 

 the right pubis is all that was recovered of the pelvis, and although it 

 is generically the most characteristic bone preserved, because of its 

 fragmentary condition, a complete description will have to be deferred 

 until the discovery of more perfect material. If our determination be 

 correct the enormous antero-posterior cievelopment of the distal end 

 with the backward hook-like extension on the posterior border makes 

 this element distinct from the pubis of any known Sauropod. The 

 shaft was evidently short and broad. Immediately above the distal 

 end the shaft is constricted but the postero-internal border above 

 expands into a thin edge, which probably opposed a similar edge on 



Fig. 4. Internal view of distal end of right pubis of Elosaurus parvus (No. 566), 

 one-half natural size, a, anterior border; /, posterior border; b, supposed pubic 

 articulation. 



the opposite pubis. Anteriorly the shaft presents a thick rounded 

 border. Externally the distal end is convex ; internally slightly con- 

 cave. The pubes were evidently united distally by a weak median 

 symphysis. See Fig. 4. 



Measurements. 

 Greatest breadth of pubis, distal end, 7Q mm. ^1 inches. 



79 mm. 



Jf 

 I1 



Greatest thickness of pubis, distal end, 27 " i^g 



Femur. — This element is long and moderately robust with the two 

 ends about evenly expanded. The shaft is compressed antero-pos- 



