Boone, Crustacea, Cruises of ''Eagle" and "Ara," 1921-28 69 



with the margins set with close, long plumose setae. The telson is 

 three-fourths as long as the carapace, tapering, triangulate, with the 

 lateral margins carinate and ciliate, the tips acute, outer surface mod- 

 erately convex. 



The eyestalk is extremely short, narrowed proximally and widen- 

 ing distally; the cornea is large, terminal, dorsal, deep brown. 



The antennulae have the basal joint concealed, the second joint pro- 

 duced into a rounded laminate plate on the lower, outer side ; the distal 

 peduncular joint is smaller than the preceding joint and is decidedly 

 compressed laterally ; the flagellum is composed of 30 stocky, tapering 

 annulae but is short, reaching only to midway the dactyl of the ex- 

 tended first legs ; the lower branch is four-fifths as long as the upper 

 and not quite so thick, yet robust ; each ring has a few long, stiff hairs 

 distally, and at the end of the flagellum there is a cluster of these setae 

 which reach as far as the end of the larger flagellum. 



The antennae are not half as long as the antennulae and have the 

 basal joint excavate, spatulate beneath the eye with the distal mar- 

 gin rounded; the acicule arises from the outer distal angle and is on 

 the lower side, closely appressed to the small second article and tipped 

 with setae; the third peduncular article is cylindrical, thick; the 

 flagellum is subequal in length to the peduncular article and is com- 

 posed of four rings, abundantly edged and tipped with long setae. 



The external maxillipeds are broad, operculum-like, the ischium 

 forming an elongate, suboval plate, with the outer surface convex and 

 set with short, transversely placed clusters of 4 to 5 long bristles ; the 

 distal margin of the merus is excavate ; the first peduncular article is 

 short, triangulate; the second article is twice as long as the first, 

 slightly curved; the third article is three-fifths as long as the second 

 and tapers to a curved, acuminate point. 



The first legs have the merus irregularly suboval, four-fifths as 

 wide as long, with clusters of stiff rugae set in short, broken grooves 

 on the outer face. The carpus, propodus and dactyl are slender, cylin- 

 drical, tapering slightly distally ; the carpus is three-fourths as long 

 as the merus ; the propodus and dactyl are subequal to the merus and 

 to each other in length and both are abundantly set with transversely 

 arranged clusters of long and short setae, those on the distal end of 

 the dactyl forming a brush. 



The second, third and fourth pairs of legs are falcate and succes- 

 sively decrease in size posteriorly ; the second and third legs each have 

 the propodus produced into a stout, curved, acute tooth that projects 



