230 U.S. NATIONAL MUSEUM BULLETIN 23& 



1 and 2. Thoracic somites 2 to 4 of nearly same length, epimeral 

 plates moderately developed, in 2 and 3 rounded, in 4 cut off squarely. 

 Thoracic somite 5 distinctly visible dorsally and laterally. 



Abdomen 5-segmented, strongly spinulose. All abdominal somites, 

 including anal somite, of nearly same length; spinulation as follows: 



Genital somite: two rows of spinules on each side of dorsocaudal 

 part of somite; some spinules near genital plates, which are armed 

 with 3 setae each. 



2nd and 3rd somites: a dorsolateral, a lateral, and a ventrolateral 

 row on each side, forming an almost complete encirclement of distal 

 parts of these somites. 



4th somite: no spinules. 



Anal somite: spinules border insertion of furcal rami; anal plate 

 haired. 



Rami of furca short, about twice as long as broad, setation as in 

 female; lengthened setae 2 and 3 are plumose (fig. 87 e). 



A distinct, small spermatophore is visible in 1st and 2nd abdominal 

 somites (fig. 896). 



Antennules 8-segmented, subchirocerate, hinge between segments 

 5 and 6. Segment 4 swollen, with short, stubby spine and conical 

 process, bearing aesthetasc and 2 setae. Setation represented in 

 figure 91^. 



Antenna (fig. 91h) with 3-segmented exopodite, with 1, 1, and 3 

 setae respectively. Allobasis with internal seta, endopodite with 

 total of 7 setae, 3 of which are geniculate. 



Mandible (fig. 9H) with strongly developed praecoxal cutting edge, 

 bearing 9 acute teeth, proximal 3 very strong. In addition there is a 

 basal seta. Palp well developed, with big basipodite, carrying 3 setae. 

 Endopodite indistinctly 2-segmented, with 2 and 3 setae respectively. 

 Exopodite unsegmented, with 3 setae. 



Arthrite of maxillule (fig. 91^) with 8 well-shaped, strong teeth, 

 some spinulose. There is only 1 endite, apparently the coxal endite, 

 bearing 2 setae. Epipodite well developed, with 2 strong setae. 

 Endopodite fused to basipodite, with 3 setae. Exopodite small, with 

 4 setae. 



On the maxilla I observed only 3 endites. Praecoxal and coxal 

 endites small, each with 2 setae. Basal endite larger, coalescent 

 with large curved spine. Endopodite strongly reduced, represented 

 by 3 fine setae (fig. 91^). 



Both maxillipedes damaged in my preparation; they are chelate, 

 with a moderately swollen basis and an unsegmented, claw-shaped 

 endopodite, as long as the basis. 



Leg 1 (fig. 91a) differing from that in female by development of 

 internal spine on basis. This spine is strongly developed and curved 

 internally; at its base it has 2 smaller spines. 



