92 U.S. NATIONAL MUSEUM BULLETIN 236 



The particulars of legs 2 to 4 follow from figures 30b-d, the setal 

 formula, and the following notes. Setal formula: 



endopodite exopodite 



leg 2 1.1.221 1.1.223 



leg 3 1.1.321 1.1.323 



leg 4 1.1.221 1.1.323 



There is only 1 seta at the internal border of 2nd endopodal segment 

 of leg 2 (fig. 306). 



Exopodite of leg 5 (fig. 30e) ovate, twice as long as broad, apex 

 slightly narrowing. 5 marginal setae: 3 external, 1 (long) apical, 

 and 1 internal. External lobe of baso-endopodite small, with fine 

 seta. Baso-endopodite well produced, reaching slightly beyond 

 middle of exopodite, with 3 marginal setae, internal seta spinulose. 



The holotype carried a sac with 9 eggs. Color faded, greenish; 

 no eyespot visible. 



Adult male, total length 0.35 mm.; greatest diameter 0.10 mm.; 

 length of longest furcal seta 0.33 mm. 



General shape of body as in female, proportional length of cephalo- 

 thorax and abdomen is 15:8. Male body, however, slightly slenderer, 

 with the result that division between cephalothorax and abdomen 

 more distinct (figures 2Sa,b). Male differs from female in following 

 points: 



1. Body, at least in present specimen, more strongly curved, with 

 the result that, in dorsal view, 4th thoracic somite visible only as 

 very narrow strip behind broad 3rd thoracic somite. 5th thoracic 

 somite in dorsal view even smaller (fig. 28a). 



2. Rostrum directed downward and slightly backward, less curved 

 than in female; in dorsal aspect placed in distinct depression of cephalic 

 somite, only base being visible. Both in the lateral and dorsal 

 aspect there is a considerable difference between female and male 

 as far as the structure of the rostrum is concerned. 



3. Abdomen composed of 5th thoracic somite and 5 abdominal 

 somites. Fine spinules occur as completely closed ring at distal 

 end of 1st abdominal somite, while much coarser spinules occur at 

 distal ends of 2nd and 3rd thoracic somites. Anal somite as in female, 

 flap invisible. Furcal rami distinctly broader than long (proportion 

 3 to 2), ornamentation as in female. Small spermatophore visible 

 in 1st abdominal somite. 



4. Antennules chirocerate, slightly exceeding length of cephalic 

 somite. Segments 1 and 3 long, 2 and 4 short. 5th segment swollen, 

 with aesthetasc. Apical segment small, obtusely pointed. Setation 

 represented in figure 29/; in addition to setae and aesthetasc, 5th seg- 

 ment has small tooth at internal margin. 



