52 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



with 2 inner setae. Third segment with 6 terminal setae. Basipodite 

 with only an outer seta; inner margin with a row of hahs. Coxopodite 

 seta stout and densely plumose. Leg 3 (fig. 258) with both rami 3- 

 segmented. First and second exopod segments with an outer spine 

 and an inner seta. Third segment with 3 outer spines and 5 terminal 

 setae. First endopod segment with an inner seta. Second segment 

 with 2 inner setae. Third segment with 3 terminal setae. Inner 

 portion of basipodite expanded with a marginal fringe as in figure. 

 No seta on the coxopodite. All setae on legs 1-4 plumose and all 

 spines fringed. Leg 5 located on ventral surface near posterior corner 

 of genital segment (see fig. 248), bearing 3 naked spines. Leg 6 modi- 

 fied to form a hooklike process that holds spermatophores in place 

 (see fig. 248). Egg strings long, 1.5 times as long as body, 



Male. — Body form as in figure 260. Total length, based on an 

 average of 2 specimens, including caudal ramus but not setae 11.7 mm. 

 Greatest width 4.6 mm measured at widest part of cephalon. Cepha- 

 lon nearly round somewhat wider than long (4.6 by 4.2 mm) with 

 posterior corners projecting. Lateral dorsal edge of segment 2 bearing 

 on each side a clear membrane that extends posteriorly to fourth seg- 

 ment. Fom'th segment with only a suggestion of winglike plate 

 found in female. Genital segment (fig. 261) 2.6 by 2.1 mm, somewhat 

 longer than wide. Spermatophores visable through posterior half of 

 genital segment. Abdomen 2-segmented, without dorsal plates. 

 First segment measuring 0.88 by 0.88 mm. Second segment longer 

 than wide (1.4 by 1.08 mm) with widest part in distal portion of seg- 

 ment. Caudal ramus armed as in female; about 4 times as long as 

 wide (1.9 by 0.49 mm). Inner margin bearing a row of short hairs. 



Oral area as in female. First antenna like that of female. Second 

 antenna (fig. 262) 4-segmented. Second segment with striated areas 

 as sliown in figure. Claw shorter and stouter than in female and com- 

 posed of 2 segments (in the female these segments are fused to form 

 1). Other oral appendages like those of female. Maxilliped (figs. 

 263, 264) heavily sclerotized with a chela at tip. When chela is closed, 

 claw of last segment fits into a bifm'cation on tip of spinelike process on 

 penultimate segment. A bossed area present between these claws. 

 In addition to claw, last segment bearing a single seta (see fig. 264). 

 Adhesion process near base of maxilliped as in female. 



Legs 1-4 as in female except for last endopod segment of leg 3 (fig. 

 265). Ventral siu-face of this segment bearing a heavily sclerotized 

 process that extends out over an embossed area near edge (this seems 

 to be modified for holding, but exact function is yet unknown). In 

 addition to ventral process, a more weakly sclerotized dorsolateral 

 process. Leg 5 (fig. 266) located ventrolaterally in middle of genital 

 segment (see fig. 261) and bearing 4 setae, 3 plumose and 1 fringed with 



