310 U.S. NATIONAL MUSEUM BULLETIN 236 



Anal somite (fig. 120c) about as long as wide, slightly longer than 

 4th abdominal somite; anal plate as in female placed in depressed 

 part of somite, broadly rounded and with smooth hyaline lamella. 

 Caudal rami Iji as long as greatest diameter, conical; insertion at anal 

 somite fringed with spinules. Setation of each ramus as in female, 

 but here setae are undamaged; setae 1, 3, 5, and appendicular seta 

 short, 2nd greatly lengthened and 3rd of intermediate length. Seta 2 

 at its insertion in fm'cal ramus fringed with hairs. 



Antennules short, % length of cephalic somite, 7-segmented, sub- 

 chirocerate, 4th segment strongly swollen with big conical process 

 bearing aesthetasc and 2 setae. Distal 3 segments much smaller, 

 forming hinge with 4th segment. Setation represented in figure 123d. 



Antenna and mouth parts as in female, with exception of man- 

 dibular praecoxa, which has 2 fairly well-developed teeth along 

 cutting edge. 



The legs, which have all been figured, have a setal formula slightly 

 different from that of the female : 



endopodite exopodite 



leg 2 1.311 0.1.123 



leg 3 1. (modified) 0.1.123 



leg 4 1.121 0.1.123 



Leg 1 (fig. 124a). Insertion of apical spine on 2nd endopodal 

 segment bordered with rather coarse spinules. 



Leg 2 (fig. 1246). Spinules along external margin of exopodite 

 very strongly developed. Internal seta at 3rd segment of exopodite. 



Leg 3 (fig. 124c). Exopodite as in female. Endopodite 3-seg- 

 mented; 1st segment with short, spiniform internal seta. 2nd seg- 

 ment very short but terminating in internal, curved apophysis, at 

 base of which a plumose seta. 3rd segment conical, its apex reach- 

 ing articulation between exopodal segments 2 and 3, with 2 apical 

 setae. 



Leg 4 (fig. 123c). Spinulation of external exopodal margin strongly 

 developed. Seta at external basis of margin fine. 



Exopodite and baso-endopodite of leg 5 fused, legs of both sides 

 also fused, separated by shallow V-shaped incision. External lobe 

 more or less free, carrying strong seta. There are, on each half of 

 the complex, 9 setae: an external group of 6, one of which is very 

 strong, and apparently belonging to the exopodite, and an internal 

 group of 3. The setae correspond with a canaliculated system in 

 the legs that shows a certain resemblance to the one found in the 

 female. The exact structure of leg 5 appears from figure 124c?. 



The genital plates (leg 6) are small lobes along the ventral part 

 of the 1st abdominal somite, each carrying 3 fine setae (fig. 124c). 



Color as in female. 



