100 U.S. NATIONAL MUSEUM BULLETIN 236 



Leg 1 (fig. 33a) with coxa haired, external margin of basis spinulose, 

 with subapical seta. Exopodite 3-segmented, endopodite 2-segmented. 

 1st exopodal segment half as long as 2nd, external margin haired and 

 with subapical seta. 2nd exopodal segment styliform, nude; external 

 seta occurs at % the margin and a small internal seta at end of in- 

 ternal margin. 3rd exopodal segment small, with 4 hooked spines. 

 1st endopodal segment styliform, reaching half length of 2nd exopodal 

 segment, with strong seta nearly at beginning of internal margin. 

 2nd endopodal segment small, with 2 claw-shaped spines at the apex. 



The particulars of legs 2 to 4 may appear from figures S3b-d, from 

 the setal formula, and from the following notes. Setal formula: 



External margin of exopodites of legs 2 to 4 strongly spinulose. 

 3rd exopodal segment of legs 2 and 3 with 3 spines at external margin; 

 only 2 of such spines occur along that margin in leg 4. 



Exopodite of leg 5 (fig. 32/) ovate, attached to baso-endopodite 

 with broad base, about twice as long as broad. 5 marginal setae, 

 3 at external margin, 1 at apex, 1 at internal margin. In addition, 

 there are some marginal spinules visible between basal parts of setae. 

 3 external setae of equal development, normally shaped. Apical seta 

 lengthened, twice as long as remaining setae. External lobe of baso- 

 endopodite small, with fine seta. Baso-endopodite reaches half length 

 of exopodite and carries 5 marginal setae: 1 short seta at external 

 border, 1 at apex, and 3 at internal border. In addition, there are two 

 spinules at the internal margin, one reaching the size of a small seta. 

 Shape and distribution of setae best judged from figure 32/. 



The type specimen carried a single egg ball attached ventrally to the 

 abdomen and containing 8 eggs. Color of preserved specimen trans- 

 parently yellowish, no eyespot visible. 



Adult male, total length 0.29 mm.; greatest diameter 0.11 mm.; 

 longest furcal seta 0.15 mm. (This specimen could not be figured 

 laterally because of the position of the antennules. It is, in lateral 

 view, not greatly different from the female; the 5th and 6th feet 

 could easily be observed.) 



In the following points I have listed the principal differences between 

 male and female: 



1. Body of male slenderer; epimeral plates better developed, more 

 caudally produced, in dorsal aspect presenting a different appearance 

 from that of female (fig. 31c). 



2. 5th thoracic somite less wide than abdominal somites 3 and 4, 

 with the result that in male distinction between cephalothorax and 



