132 U.S. NATIONAL MUSEUM BULLETIN 236 



in the middorsal line in lateral aspect. General outline of body 

 as well as pattern of armature appears in figure 46a. Genital complex 

 too is broadly winged; wings, caudally, are rounded and haired; 

 laterally, cut off squarely and also hah-ed. 



Abdominal somites, in my specimen, completely retracted under 

 genital complex and invisible from above, in contrast to A. Scott's 

 specimen, where they are distinctly visible. This explains the dif- 

 ference in aspect of the posterior part of the body between the two 

 specimens and, to a certain degree, the difference in length. 



Rami of furca slightly more than twice as long as broad, cylindrical. 

 There are 5 marginal, apical setae and 1 appendicular seta; 2nd thick 

 and greatly lengthened, reaching half length of body; remaining 

 setae and appendicular seta small. 5th seta inserts halfway along 

 external border; it is very delicate (fig. 47^). 



Rostrum a broadly based plate, basal part visible from above, 

 rostral plate curving away from base suddenly, apex bluntly pointed 

 (fig. 466). 



Antennules short, 7-segmented, setation shown in figure 47a. Aesthe- 

 tasc on 3rd segment as well as on 4th segment; latter borne, together 

 with 2 setae, on short, conical process, reaching as far as jointing 

 between antennular segments 5 and 6. 7th segment long, twice as 

 long as preceding. Antenna (fig. 476) with basis and 1st endopodal 

 segment separate. Basis with short, haired apical spine; exopodite 

 2-segmented, number of setae 1 and 3 respectively. One of apical 

 setae with broadened edge, lancet-shaped. 1st endopodal segment 

 with 1 internal seta; 2nd elongate, with almost basal internal seta 

 and 2 + 6 terminal setae; one of terminal setae fine, 4 of apical setae 

 geniculate. External margin spinulose, spinules terminating in 2 

 flattened teeth. 



Mandibular praecoxa with big, flattened cutting edge, armed with 

 7 strong teeth and basal seta. Palp 2-segmented, only apical seg- 

 ment bears setae, numbering 4 (fig. 47c). 



MaxiUule with conspicuous arthrite, with 7 curiously modelled 

 teeth. Coxa small, with small endite carrying 2 setae, almost hidden 

 by basal endite (in the drawing, figure 47(1, shown laterally in reflexed 

 position). Basis with long endite, bearing 3 setae, and small exite, 

 carrying 1 seta. No trace of endopodite nor exopodite. 



Maxilla with small praecoxal and coxal endite, with 1 and 2 setae 

 respectively. Basis with big endite, carrying strong spine, coalescent 

 with endite, and seta. Endopodite vestigial, represented by 3 setae 

 attached to basal endite (fig. 47e). 



Maxillipede large, chelate. Coxa with subapical, haired seta. 

 Basis big, internally and externally swollen, with rows of hairs along 

 both margins. Curved setiform spine at internal margin, % length 



