147 



men iieir tlic antt'rior iiiiugiii; and tin- shorter concavity of tlu; aiiti'rior margin 

 leads to the belief that tin; aiit(!rior extremity of the bone is the more pro- 

 longed, as in Clida^tes 2»'opytho7i. 



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

 rHgose surfaces. 



Consequently, llic liuments has no head, i)ut merely an elongate articular 

 surface, which e.\hil)its a median keel and a shoit angular expansion near the 

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

 descril)ed in C pro2)ytfion^ than any other, and very diiTerent from that 

 described in Lindoii diispelor. It is a broad Hat bone, expanded at the 

 extremities, and in one iilaiir 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 deterininable. 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 l)orders. A moderate thickening exists on the 

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

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

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

 process, as in C propythoii. 



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

 I supjiose to be that bone, accompanies the others. It is tlat, truncate prox- 

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

 obli(|uely 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 quinquelateral bone, one side being marginal 

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

 which arc pro!)ably metacarpals. Tiie general struclnrc of the wiiolc liml) 

 may be determined from these and from the numerous ])i'ialangr.!<. Tiic i()rmcr 

 are flattened and with oblique extremities; the latter more cyliiidric, 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, whicli are concave. All of these elements are rod-like, 

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

 immediately following the metacarpals are flattened, i>ut thickened distally. 



The number of disds cannot he readilv determined, I)ut i()ur nuiy i)e 



' Sec TrniiRactioiiB of thu American Philosopliical Society, 18fi9, p 219, Table XII, tig. 17. 



