147 



men near the anterior margin ; and the shorter concavity of the anterior margin 

 leads to the belief that the anterior extremity of the bone is the more pro- 

 longed, as in Clidastes propython. 



The glenoid cavity is not concave, but merely two adjacent flattened 

 rcigose surfaces. 



Consequently, the humerus has no head, but merely an elongate articular 

 surface, which exhibits a median keel and a short angular expansion near the 

 middle. This bone is of remarkable form, more resembling that I have 

 described in C propython 1 than any other, and very different from that 

 described in Liodon dyspelor. It is a broad, flat bone, expanded at the 

 extremities, and in one plane distally, so as to be as wide as long. In the 

 present individual, it is crushed by pressure, so that its thickness is not 

 readily determinable. Its external surface rises into a crest medially at the 

 narrowest portion, which continues to the lateral angle of the proximal end, 

 following parallel to one of the borders. A moderate thickening exists on the 

 opposite side, a little beyond the extremity of the crest. Strongly rugose 

 strife extend to the edges of the articular faces. An oval rugose muscular 

 insertion exists on the least prominent of the distal angles, and not on a 

 process, as in C. propython. 



A bone, which, from its analogy to the radius of the last-named species 

 I suppose to be that bone, accompanies the others. It is Hat, truncate prox- 

 imally, and with nearly parallel borders on the proximal half. Distally, it is 

 obliquely expanded ; the outline forming a segment of an ellipse, whose axis 

 is oblique to that of the bone. Its extremities are rugose-striate. 



One carpal remains; it is a quinquelaterai bone, one side being marginal 

 and concave. Perhaps it is the intermedial. There are several elements, 

 which are probably metacarpals. The general structure of the whole limb 

 may be determined from these and from the numerous phalanges. The former 

 are flattened and with oblique extremities ; the latter more cylindric, with a 

 transverse truncation. Both have a median contraction, which becomes less 

 marked in the distal ones ; these are also more cylindric, entirely so at the 

 distal extremities, which are concave. All of these elements are rod-like, 

 much more slender than any of those figured by Cuvier or Leidy. Those 

 immediately following the metacarpals are flattened, but thickened distally. 



The number of digits cannot be readily determined, but four may be 



1 See Transactions of the American Philosophical Society, 1809, p 219, Table XII, lig. 17. 



