224 U.S. NATIONAL MUSEUM BULLETIN 236 



spinules. 3rd and 4th abdominal somites of equal lengths; 3rd with 

 lateral spinules near distal end of somite; 4th without spinules. 

 Abdominal somites, in my specimen, fairly strongly telescoped, 

 especially anal somite. Anal somite as long as somite 4, deeply 

 mcised between insertion of furca; mscrtion bordered with spinules. 

 Anal operculum invisible, apparently telescoped into 4th somite. 

 Furcal rami twice as broad as long, with 5 marginal setae and 1 

 appendicular seta each: appendicular seta fine, scarcely visible; seta 1 

 fuie, short and plumose; setae 2 and 3 lengthened and thickened, 

 setose, 2nd reaching end of abdomen, 3rd half that length; seta 4 

 small and spiniform; seta 5 fairly long and straight, pointing laterally. 



Antennules 8-segmented, 4th segment long (3K times as long as 

 wide), with small, elongated tubercle, bearing aesthetasc and 2 setae. 

 Segments 5-8 small; setation of antennule represented in figure 88a. 



Antenna (fig. 886) with distinct, 3-segmented exopodite, with 1, 1, 

 and 3 setae respectively. Allobasis with internal seta, endopodite with 

 total of 7 setae, one of which is particularly strong and spinulose. 



Praecoxa of mandible well developed, with 7 strong teeth and seta 

 at cutting edge. Palp with big basipodite, bearing 3 setae, and 2- 

 segmented endopodite, bearing 2 and 5 setae respectively. No trace 

 of exopodite (fig. 88c). 



Maxillule with well-developed arthrite, bearmg 7 strong, spiniform 

 teeth. Apparently only 1 endite (coxal or basal), with 2 setae. 

 Endopodite styliform, fused to basipodite, position of which can best 

 be appreciated from figiu-e 88d; one of 6 setae a strong, curved spine. 

 Exopodite small, elongated, with 4 setae. 



Maxilla (fig. 88e) with 2 small praecoxal endites and one coxal 

 endite, number of setae 4, 3, and 3 respectively. Basal endite better 

 developed, with strong, coalescent spine and seta; endopodite strongly 

 reduced, with 2 setae. 



Maxillipede (fig. 80/) of usual type, chelate. Coxa with 2 spinulose 

 setae; basis moderately swollen, with 2 setae along internal margin. 

 Endopodite unsegmented, claw-shaped, as long as basis, with 2 addi- 

 tional setae. 



The structure of the genital field appears in figure 87c. Genital 

 plates on both sides with long, plumose seta and 2 shorter spines. 2 egg 

 balls attached to genital somite, each containing 8 eggs. 



Leg 1 (fig. 88g) with 3-segmented endopodite and exopodite; 1st 

 endopodal segment long and styliform, longer than whole exopodite, 

 4 times as long as wide, with subapical seta at mternal margin. 3rd 

 endopodal segment 5 times as long as wide, twice as long as segment 2, 

 with 2 hooked spines of unequal length. 3 exopodal segments of 

 nearly same length; no seta at internal margm of segment 2; 3rd 

 segment with total of 4 appendages. 



