196 U.S. NATIONAL MUSEUM BULLETIN 23 6 



lateral spinules, 4th nude. 5th thoracic somite in this specimen 

 completely telescoped into 4th, short, with nude anal plate. Furcal 

 rami as long as wide; insertion on 5th abdominal somite marked by 

 spinules. Each ramus with 5 marginal setae and 1 appendicular 

 seta, heavily damaged in this specimen, but 2 and 3 thickened and 

 probably also lengthened. Some scattered spinules occur along 

 internal and external borders. Basal portions of setae not swollen. 



Antennules 8-segmented, 1st and 2nd segments thickened, 4th 

 segment fairly long, with small conical process bearing aesthetasc and 

 2 setae. Setation represented in figure 72/. 



Antenna with 3-segmented exopodite, bearing 1, 1, and 3 setae, 

 respectively. Allobasis large, with single internal seta at half its 

 length. Endopodite with total of 8 appendages, 4 of which are 

 geniculate. 



Mandible and maxillipede as figured by Sars (1906, pi. 96). Man- 

 dible with big basopodite; exopodite large, unsegmented, with 3 setae, 

 endopodite much larger, also unsegmented, with total of 7 setae. 

 Claw of maxillipede as long as basis, slightly curved at apex. Internal 

 margin of basis straight, with 2 setae. 



Leg 1 (fig. 72^) with 3-segmented endopodite and exopodite. Basis 

 with distinct internal and external spine. 1st endopodal segment 

 styliform, longer than whole exopodite, with small seta almost at end 

 of internal margin. Segments 2 and 3 of endopodite small, 3rd with 

 claw and hooked spine. 2nd exopodal segment only slightly longer 

 than 1st, with small internal seta. 3rd exopodal segment small, with 

 a total of 5 setae. 



Legs 2 to 4 (figs. 72h-j) have the following setal formula: 



endopodite exopodite 



leg 2 1.2.121 1.1.223 



leg 3 1.2.321 1.1.223 



leg 4 1.1.221 1.1.223 



Leg 5 (fig. 72k) with broadly ovoid exopodite, attached to baso- 

 endopodite with narrow zone, with 6 short, marginal setae. Baso- 

 endopodite covering % length of exopodite, with 3 internal setae and 

 2 apical setae. External margin spinulose. Color completely faded, 

 faintly yellowish. The female carries 3 eggs in one sac. This 

 specimen differs from the usual conception of the species by the 

 imusually short 2nd segment of the exopodite of leg 1. 



Adult female (loc. 594), total length 0.31 mm.; greatest diameter 

 0.09 mm,; greatest length of furcal setae 0.18 mm. 



This specimen differs from that described above in the following 

 points: 



1. Body very strongly contracted and, as a result, much more com- 

 pactly built (figs. 71c, 72a). 



