184 U.S. NATIONAL MUSEUM BULLETIN 236 



as in female, with laterodorsal spinules along distal ends of somites. 

 Spermatophore visible in abdominal somites 1 and 2. Anal somite 

 short, shorter than preceding somite, with strongly developed 

 spinules along insertion of fm"cal rami. Furca as in female, 2nd seta 

 with smaller basal swelling. 



Antennules subchirocerate, 7-segmented, 4th segment of consider- 

 able length, with swollen basal portion, apparently resulting from 

 fusion of several segments. There is a small conical swelling bearing 

 the aesthetasc and two setae, in front of which a short spine may be 

 observed, forming a part of the clasping organ. 



Antenna (fig. 70^) as in female with 2 pectiniform spines on endopo- 

 dite. Exopodite 2-segmented, with 2 and 4 setae respectively. 



Basis of leg 1 (fig. 70a) with 2 very strong spines, 1 internal and 1 

 external, pointing slightly upward. Endopodite 2-segmented; 1st 

 segment styliform, internal seta almost apical, 2nd endopodal segment 

 small, 2 of setae spiniform, with pectinate bristles (fig. 706). Endopo- 

 dite of leg 3 modified; structure appears in figure 7Qd. Exopodite of leg 

 5 (fig. 70/) ovate, unsegmented, 2)^ times as long as wide, with 7 

 marginal setae: 3 external, 2 apical, and 2 internal. Baso-endopodite 

 overlapping distal ^i of exopodite, with 2 apical setae and small 

 hyaline area near insertion of exopodite. 



Adult female (loc. 589), total length 0.33 mm. 



General shape of body as in above-described specimens, but slightly 

 slenderer; division between cephalothorax and abdomen not distinctly 

 marked (fig. 68a). Head and 1st thoracic somite fused to form 

 cephalic somite, which is shorter than combined lengths of thoracic 

 somites 2 to 4. Lateral parts of cephalic somite produced, broadly 

 rounded, covering basal parts of oral appendages. Epimeral plates 

 of thoracic somites 2 to 4 well developed, rounded; somites of equal 

 length. Rostrum bigger than in remaining specimens, as long as 

 antennular segments 1 and 2, in dorsal aspect slender, apex rounded, 

 separated from cephalic somite by a groove. 



5th thoracic somite small. Separation between 1st and 2nd 

 abdominal somites, forming genital somite, fairly distinct; somites 

 have about same length and are equal in length to 3rd and 4th somites. 

 Spinules occur on 2nd and 3rd abdominal somites in the positions 

 indicated in figures 68a,6. Anal somite short, anal flap very broadly 

 rounded, bordered by hairlike spinules. A row of spinules also occurs 

 along insertion of furcal rami. 



Antennules long, only slightly shorter than cephalic somite, 

 8-segmented, segments 2 and 3 long, segment 4 small, with long conical 

 process bearing aesthetasc and 2 setae. 



