Boone, Crustacea, Cruises of ''Eagle" and " Ara," 1921-28 75 



so tliat the reflexed propodus fits closely into it ; the posterior lateral 

 face of the carpus is convex ; the propodus is very large, being twice 

 as long as the carpus, the palm comprising two-thirds of this length. 

 The palm is triangular, widening distally; the outer surface is flat, 

 covered with small, crimson rugae ; the propodal finger is triangular, 

 with the tip upcurved, the cutting edge slightly carinate and sinuate. 

 The hinged finger is subequal to the propodal finger but has a decided 

 submarginal groove paralleling its upper lateral margin. The left 

 cheliped has its propodal finger narrower than that of the right cheli- 

 ped and its hinged finger much broader basally. There is a distinct 

 gape between the fingers of the left cheliped, the propodal finger also 

 having a slight excavation near its distal end and its apex not up- 

 curved ; the tip of the hinged finger is curved and convex subdistally. 

 The inner depressed area of the cutting edge of both the hinged fingers 

 also the basal area of the propodal fingers are densely pilose; these 

 hairs forming a short, velvety brush which is not visible in an external 

 view of the chelipeds. 



The first, second and third pairs of ambulatories are similar; the 

 first and second pairs are subequal in length, the third being shorter, 

 reaching only to midway the propodus of the second pair. Each leg 

 has the merus broad, one-half as wide as long, with the anterior lateral 

 margin armed with three or more spines and fringed with plumose 

 setae ; the posterior lateral margin of the first and second legs is armed 

 with a sharp subdistal spine, which is absent on the third leg; the 

 carpus is a little more than half as long as the merus and is much 

 narrower; it is convex dorsally, widening a little distally, and the 

 upper distal angle is roundly produced ; the propodus is about as long 

 as the carpus but is much slenderer and is produced distally on its 

 posterior lateral margin into a rounded process, which reinforces the 

 dactyl joint; the dactyl is slightly more than half as long as the 

 propodus and is stout and curved with an acuminate tip. The four 

 distal joints of these legs are well furnished with tufts of setae, also 

 a few plumose setae. 



The fifth pair of legs are characteristically small, slender, reflexed 

 and chelate. The merus is very long, the carpus almost as long as 

 the merus but slenderer and furnished with a brush of setae on the 

 inner distal margin; the propodus is scarcely two-fifths as long as 

 the carpus, and the subequal, spoon-shaped fingers comprise a third 

 of this length; the propodus and closed fingers are cylindrical and 

 covered with stiff setae ; the apices of the fingers are broadly rounded. 



