98 U.S. NATIONAL MUSEUM BULLETIN 236 



and 3, and 4 and 5, of same length. Epimeral plates, especially of 

 4th and 5th thoracic somites, well developed, laterally and back- 

 wardly produced, rounded (fig. 31a). 



Genital somite composed of fused abdominal somites 1 and 2; line 

 of fusion very distinct on lateral and dorsal surfaces. Some hairs or 

 spinules occur laterally at distal margin of genital somite, which is 

 about twice as broad as long. Abdominal somites 3 and 4 of about 

 same length, strongly telescoped, both somites with some ventro- 

 lateral spinules at distal margin. Anal somite about as long as somite 

 3 or 4, anal flap slightly rounded, almost straight, without hairs or 

 spinules. 



Caudal rami twice as broad as long. 5 marginal setae and 1 

 appendicular seta on each ramus. Setae 1, 4, 5, and appendicular 

 seta fine and short, seta 5 placed at external furcal border almost 

 near insertion of furca on anal somite. Setae 2 and 3 lengthened 

 and thickened, especially seta 2, which reaches % body length and is 

 slightly swollen basally. In addition, there are some fine spinules 

 along the internal and external furcal border, the position of which 

 can be judged best from figure 316. 



Antennules % length of cephalic somite, 8-segmented, basal 4 seg- 

 ments large, apical 4 segments small. 4th segment with small conical 

 process, carrying aesthetasc and 2 setae. Setation of whole anten- 

 nule represented in figure 32a. 



Antenna (fig. 326) with allobasis and small endopodite, carrying a 

 total of 8 appendages: 5 geniculate setae and 3 spines, Exopodite 

 styliform, fairly long, 2-segmented, each segment with 2 setae. The 

 position of the apical seta suggests that more setae had been present 

 but had been removed during preparation; the condition described, 

 however, prevails on both sides. 



Cutting edge of mandibular praecoxa well developed, bearing 6 

 sharp teeth and basal seta. Basipodite triangular, with 3 setae. 

 Exopodite styliform, with 2 setae. Endopodite unsegmented, with 

 1 lateral and 3 apical setae (fig. 32c). 



I failed to obtain a satisfactory preparation of the maxillulae. 



Maxilla (fig. S2d) with 3 endites; praecoxal and coxal endite small, 

 each with 2 setae. Basal endite slightly bigger, with strong coalescent 

 spine and fine seta. Endopodite represented by single, unsegmented 

 lobe, bearing 3 setae. 



Coxa of maxillipede (fig. 32e) with strong, setose internal seta, part 

 of external margin haired. Basis 3 times as long as wide, internal 

 border with single fine seta, external border slightly swollen. Endop- 

 odite reduced to form single, slightly curved digit, as long as basis 

 and without setae. 



