76 Bulletin Vanderhilt Marine Museum, Vol. V 



The external maxilliped has the merus with the inner dostal bor- 

 der oblique and the distal margin nearly transverse and the outer dis- 

 tal angle produced into a moderate rounded lobe. 



The ehelipeds are equal in both sexes. They are about twice the 

 length of the carapace, with the merus extending beyond the carapace 

 for the distal two-fifths, three-sided, armed along the inner lateral 

 margin with a series of four or five acute spines, that increase in size 

 towards the distal end of the joint; the exposed upper end of the 

 merus is setose and also transversely ridged; the carpus has a very 

 strong spine at its inner distal angle ; the upper surface is broken by 

 several beaded carinae, two of which run along the outer margin and 

 terminate anteriorly in two small spines, one at the outer distal angle, 

 the other above it, on the distal margin ; a third spine occurs above the 

 second but some distance back from the distal margin; the palm is 

 sculptured by five longitudinal distal costae as follows: one, only 

 lightly beaded, extending the length of the palm and lower finger, 

 along the outer, lower margin ; a second, stronger costa extending the 

 length of the palm and terminating at a point opposite the base of the 

 lower finger; a third definite, but less conspicuous costa above the 

 second and more granulose, having proximally just above it, a strong 

 spine; a fourth costa extends from just above this spine to the base 

 of the upper finger and bears another spine about three-fifths of its 

 length and terminates in a slightly smaller spine distally; the fifth 

 costa extends along the upper margin of the palm as a ridge that ter- 

 minates slightly in advance of the middle in an acute spine and is 

 followed by another short ridge which terminates in a second acute 

 spine subdistally. The sixth costa extends midway the length of the 

 inner surface of the palm. The upper half of the outer surface of the 

 palm is covered with coarse granules in between the costae. There is 

 also a fine pilosity between the carinae on both carpus and propodus. 

 The fingers are three-fourths as long as the palm, the tips overlap- 

 ping; the upper finger being much down-curved; the fingers of the 

 larger claw have a moderate gape; the upper finger bearing a very 

 large, subbasal molar and a few small teeth on the distal half. This 

 lower finger has a gape basally and several triangular teeth on the 

 distal half. The fingers of the smaller cheliped meet throughout their 

 length and have the cutting edges fitted with triangular teeth that in- 

 terfit. Both fingers are grooved on both inner and outer surfaces. 



The second, third and fourth pairs of legs are subequal, very 

 slender, with the upper lateral margin of the merus fringed with 



