Boone, Crustacea, Cruise of "Alva," 1931 199 



tooth and an articulated spine just inside the tooth. The widely 

 convex margins of both blades are crenulate, ciliate. 



The eye is very prominent, the stalk cylindrical, shorter than 

 the cornea, which terminates in a faceted papilla. 



The antennulae are quite small, the peduncle short, the basal 

 article has a broad stylocerite with two subequal spiniform den- 

 ticles ; the flagellum has the outer branch thick for the proximal 

 six to eight articles, thence deeply cleft, the inner branch consist- 

 ing of five or six very small setose articles, the outer branch com- 

 posed of seven slender elongate articles. The inner antennular 

 flagellum consists of fourteen to sixteen slender articles and ex- 

 tends a short distance beyond the outer branch. 



The antennae have the peduncle longer than that of the anten- 

 nulae ; the basicerite strong, with a strong acicule ; the third article 

 is cylindrical, equal on both sides in the present specimen (but 

 said to be variable, sometimes unequal) ; the scaphocerite is one- 

 half as long as wide, a broad, ovate, with a subdistal tooth on the 

 outer margin. It extends beyond the antennular peduncle for one- 

 fifth of its length. The antennal flagellum is quite long, slender. 



The first pair of legs of the female is subequal, quite small 

 and slender, when extended, reaching only to the base of the palm 

 of the second legs or great chelipeds, and has the carpus elon- 

 gate, slenderly obconic, with a distal spine ; the propodite is about 

 as long as the carpus, the palm being three-fifths of this total 

 length, subcylindrical, not appreciably larger than the carpus ; the 

 fingers slender, tufted with bristles distally. 



The second pair of legs is about one and one-half times as 

 long as the carapace ; the meral joint is slender, one-fourth longer 

 than the ischium, arched, and bears a distal tooth ; the carpus is 

 about one-sixth longer than the merus, slender ; the propodus has 

 the palm elongate, convex, but somewhat compressed laterally; 

 the palm is twice as long as the carpus, and the fingers, which 

 are slightly down-bent throughout their length, are one-half as 

 long as the palm, tapered, with the cutting edges meeting, faintly 

 dentate, the tips acute. 



The three pairs of ambulatory legs are similar, very slender, 

 flattened. The first ambulatory measures as follows: merus, 2 

 mm. long; carpus, 1 mm. ; propodus, 2 mm. ; dactyl, 0.4 mm., with 

 biunguiculate tip, which is but little curved, the outer apex being 



