90 U.S. NATIONAL MUSEUM BULLETIN 236 



times wider than long. Length of genital somite 1% the combined 

 lengths of abdominal somites 3 and 4 ; 4th abdominal somite half as long 

 as 3rd. Some fine spinules occur on distal part of dorsolateral wall of 

 abdominal somites 1+2, 3, and 4. Anal somite short, strongly tele- 

 scoped into 4th; anal flap visible in lateral aspect (under distal wall of 

 4th somite) but invisible in dorsal aspect. 



Furcal rami slightly diverging, distinctly broader than long (pro- 

 portion 5:3), with 5 marginal setae and 1 appendicular seta each. 

 Setae 1, 4, 5, and appendicular seta short, 4th twice as long as 1 and 5. 

 Setae 2 and 3 lengthened and thickened, especially 2nd, which reaches 

 % body length. Setae 2 and 3 not swollen basally. Some fine 

 spinules occur at the internal and external furcal borders. 



Antennules (fig. 29a) slender, % length of cephalic somite, 9- 

 segmented; segments 1 to 4 of nearly same length, long, segment 4 

 with small, conical process bearing aesthetasc and 2 setae. Segments 

 5 to 9 short. Setation of antennule represented in figure 29a. 



Antenna (fig. 296) of normal type, without pectinate spines. Exopo- 

 dite 2-segmented, with 2 and 4 setae respectively; endopodite with 3 

 spines and 4 geniculate setae. 



Praecoxa of mandible with well-developed cutting edge, bearing 5 

 teeth and basal seta. Palp well shaped, basis and coxa fused, large, 

 with 4 short setae. Endopodite and exopodite styliform, without 

 segmentation, exopodite with 3, endopodite with 6 setae (fig. 29c). 



No suitable preparation of the maxiilule was obtained. 



Maxilla (fig. 29d) with 4 endites : 2 praecoxal and only coxal endite 

 small, each with 2 short setae. Basal endite better developed, armed 

 with large, curved spine, coalescent with endite, and fine seta. En- 

 dopodite almost completely reduced and represented by 3 fine setae 

 on basal endite. 



Maxillipede (fig. 29e) strongly developed, chelate. Coxa elongate, 

 without setae. Basis strongly swollen, deeply incised to form square 

 notch, with oblique row of spinules. Digit curved, acutely pointed, 

 % length of basis, formed by two fused endopodal segments; line 

 of fusion almost obliterated. I failed to observe additional setae 

 on the digit, near the fusion of both segments, as is frequently seen 

 in other species of Harpacticus. 



Coxa and basis of leg 1 (fig. 30a) well developed; external border 

 of coxa swollen, spinulose. Basis with strong, spinulose seta at 

 external margin and much smaller seta on internal margin near in- 

 sertion of endopodite. Both endopodites and exopodites 3-seg- 

 mented. Segments 1 and 2 of exopodite elongate, of nearly same 

 length, both with subapical, short seta; 1st with haired external 

 margin. Apical segment very small, almost completely telescoped 

 into 2nd, bearing 4 appendages : 3 curved claws and a spiniform seta. 



