lO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



median width of palm and carpus equal ; fixed finger measured from 

 the sinus at its base is three- fourths the length of the palm measured 

 back from the same point ; it is fairly long and ends in a stout conical 

 subacute tip, and a very low triangular tooth is situated about the 

 middle of its length. 



The movable finger is nearly a third longer than the fixed one and 

 armed with three stout conical teeth, a blunt one near the base tending 

 to fit into a notch at the upper end of the base of the sinus between the 

 fingers ; the second and larger of the other two more pointed teeth is 

 placed just before the middle of the finger, and the third and smallest 

 is located about one-third the distance from the second tooth to the tip ; 

 the upper border of the movable finger is smoothly rounded off, but 

 toward the articulation is somewhat eroded-looking, two short grooves 

 and several pits appearing here ; there is a low, conical, inconspicuous 

 tubercle, and perhaps a second lower one adjacent to it, just before the 

 articulation ; the fingers cross in such a way that the tip of the fixed 

 one closes between the anterior of the three teeth of the movable finger 

 and its hooked tip, and the two conical teeth of the upper finger bite 

 just before the triangular tooth of the lower margin. 



On the outer face of the palm, more or less continuing the line of 

 the outer edge of the prehensile margin of the fixed finger back on to 

 the palm, is a well-marked, curved carina extending back nearly half 

 the length of the palm ; above this carina is a low, depressed, triangular 

 area ; the anterior margin of the palm is armed with two blunt, for- 

 wardly directed teeth, one forming the outer side of the notch at 

 the upper end of the base of the sinus between the fingers and the 

 second placed laterally just below the articulation of the movable finger. 

 Lower border of the palm and movable finger somewhat cristate and 

 obscurely and bluntly serrate, rather, one might say, undulate, owing 

 to the insertion of hair tufts found there ; al)ove the palm is more or less 

 carinate in its posterior two-thirds. The carpus is cristate above and 

 below, the anterior dorsal and ventral angles forming each a com- 

 pressed triangular tooth. 



All joints are smooth and shining. The merus shows a blunt longi- 

 tudinal ridge on the outer face ; the infero-proximal angle of this joint 

 is armed with a conspicuous, angled lobe or toothlike process ending 

 primarily in a stout, elongate, conical spine, on the inner hinder side 

 of which is a secondary, smaller, and somewhat curved spine ; the 

 laminate lower margin of this joint is seven-toothed in its anterior 

 two-thirds, the first two flattened, the second of these obscurely 

 doubled, the following five placed on the anterior curve of the lower 

 margin more tuberculiform, though compressed ; the upper margin 



