REPTILIA : CASEA 



127 



regarding the first and second carpalia and the first centrale; 

 these three bones were found closely attached, the centrale very 

 small, almost vestigial, the first and second so closely united that 

 I am not certain that more than one is really present. They are 

 all small. The metacarpals and phalanges found associated are 

 shown in the text figure in un- 

 broken lines, but with nothing 

 to guide in their location save 

 that two pairs of phalanges were 

 found articulated as indicated in 

 the figure by the plus sign placed 

 near the joint. That the hand 

 had the primitive phalangeal 

 formula, 2, 3, 4, 5, 3, there can 

 be scarcely a doubt, and I have 

 so collocated the bones. It is 

 quite certain that both the first 

 and fifth fingers were much 

 longer and better developed 

 than is the case in Varanosaurus. 

 The hand, it is seen, is very 

 much like the foot, and fully as 

 large if no larger; it was broad 

 and rather short, but with strong 

 and powerful claws, as shown in 

 Plate XIX, Fig. 4. 



Pelvic girdle and extremity 

 (Plates XXI-XXIII).— The 

 pelvis, preserved in three speci- 

 mens, is perfect and almost 

 undistorted in No. 655. The 

 two sides meet in a moderately firm horizontal symphysis, a 

 small notch only at the junction of the four bones remaining 

 unossified as a small pubo-ischiadic fenestra. The ilium is con- 

 spicuously different from all those hitherto observed in the 

 American Permian in having a prominent anterior projection and 

 only a small posterior one. It is somewhat helmet-shaped, con- 



Fig. 31. — Casea broil ii. 

 leg, one-half natural size. 



Right front 



