84 Bulletin Vanderhilt Marine Museum, Vol. V 



one-half times as long as the carapace, armed on the outer lateral 

 margin with a distal and a well-spaced, stronger subdistal, upcurved 

 spine, and on the inner lateral margin with three well-spaced, upward 

 and outward curved spines, the first of which is midway the margin, 

 the third spine being subdistal, while the second is intermediate be- 

 tween the two. The proximal half of the upper surface of the merus 

 is smooth except for a long V-shaped line; the distal portion of this 

 upper surface is slightly rounded and very granulosa, as are both 

 lateral margins and also the lower frontal surface of the merus. The 

 carpus is moderately rounded and lightly granulose on its upper 

 surface, with its outer margin carinate, this carina terminating in a 

 sharp short spine at the outer angle; the inner angle of the carpus is 

 produced into a very long, curved spine; the palm is as long as the 

 merus and the fingers are three-fifths of the length of the palm. The 

 outer surface of the palm is ornamented by four costae and the inner 

 surface by one which extends midway the length of the palm and 

 terminates in a small acute, subdistal spine. On the outer surface of 

 the palm a long, granulose costa extends along its lower margin and 

 down to the tip of the lower finger; above this, a second, the most 

 prominent costa of the series, extends to a point midway between the 

 fingers; the third and least conspicuous costa is some distance above 

 this and has an acute spine near its base and extends to a point above 

 the base of the upper finger. The fourth costa extends along the 

 upper margin of the palm and terminates in a sharp, subdistal spine. 

 The two upper costae and the space between them is covered with 

 coarse granules. The second costa is very granular and has above it 

 a line of very coarse punctae. The space between the first and second 

 costae, also the space between the second and third costae, are smooth. 

 The upper finger is a little deflected with curved tip and moderate 

 gape between the two fingers. The upper finger has a large basal 

 tooth, followed by a series of triangular teeth which are themselves 

 grouped to form triangles, consisting of a large tooth at the apex, 

 with two to three small teeth on either side of the apical tooth. These 

 interfit with similar groups of teeth in the opposing finger. The 

 fingers of the right cheliped have almost no gape and there is no basal 

 molar on the upper right finger. 



The second, third and fourth pairs of legs are similar, slender, the 

 second pair extending to the base of the palm of the cheliped; the 

 third pair subequal to the second, while the fourth pair extends only 



