Boone, Crustacea, Cruise of "Alva," 1931 185 



mm. long, extending only to midway or about three-fifths the 

 length of the second peduncular article of the antennulae. The 

 eyes are conspicuous, apparently normally directed obliquely out- 

 ward and forward, their length about one-fifth less than that of 

 the rostrum ; stalk thick, short, width almost equal to their length ; 

 cornea hemispherical, terminal, its depth about one-third less 

 than the visible portion of the stalk. 



Antennulae with the first peduncular article oblong, laminate, 

 a little shorter than the rostrum, with an acute, small tooth at the 

 outer distal angle; the second and third articles, cylindrical, sub- 

 equal, length no greater than width, flagellum short, inner whip 

 about as long as the peduncle, consisting of approximately ten 

 longish articles, the proximal five of which are thickish ; the outer 

 whip two-thirds as long as the inner whip, fleshy, subclavate, 

 consisting of about eight closely fused rings, the inferior lateral 

 margin with a web-like fringe of long setae. 



Antennae with the basicerite short, scaphocerite a little longer 

 than the antennular peduncle but about 1 millimeter shorter than 

 the antennal peduncle, quite widely oval, the greatest width being 

 equal to two-thirds of the length ; the inner lateral and distal mar- 

 gins being much more convex than the slightly bowed outer lateral 

 margin, which terminates in an acute, incurved distal spine that 

 projects beyond the convex distal margin and extends as far as 

 does the distal margin of the third peduncular article ; the second 

 peduncular article is short, cylindrical ; the third article similar, 

 but very long and slender, reaching a little beyond the distal, 

 convex margin of the scaphocerite ; the flagellum is about one and 

 a third times as long as the peduncle and quite slender. 



The first pair of chelipeds is equal, slightly slenderer than 

 any other pair, approximately equal in length to the first pair of 

 ambulatories ; the ischial joint is two-thirds as long as the merus ; 

 the merus is compressed cylindrical, subequal in length to the 

 carpus, which is more slender, clavate, very narrowed proximally, 

 widening distally ; the propodus is three-fifths as long as the car- 

 pus, of no greater width, the palm is cylindrical, a little longer 

 than nearly subequal fingers, which are tapered, meeting through- 

 out their length, pointed distally. 



The second chelipeds are moderately enlarged, with the ischial, 

 meral and carpal joints of subequal length; the ischial joint slen- 

 der, sublaminate, arched; the meral joint thickened, unequally 



