160 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 521 



Description. — Female and male cephalothorax (figs. 60a,b) ellip- 

 tical, consisting of cephalon and first 4 thoracic segments. Frontal 

 region less than one-ninth the length of cephalothorax, with fine 

 membrane along anterior margin. Lunules large, extending poste- 

 riorly, on ventral sm"f ace, slightly past division between frontal region 

 and rest of cephalothorax. Posterior margin of median cephalotho- 

 racic region trilobed, not convex as originally described, median lobe 

 projecting over anterior end of free fom'th pedigerous segment. For 

 description of rest of cephalothorax and fourth pedigerous segment, 

 see original description. 



Female genital segment (fig. 60c?) of general obcordate shape al- 

 though anterior end broadly rounded. Posterior lobes projecting to 

 middle of abdomen, tipped by fifth legs. Fifth legs (fig. 60/) consist- 

 ing of 2 knobs, outermost with single plumose setule, inner with 2 

 plumose setules. Female abdomen indistinctly 2-segmented, broad, 

 lateral margins irregularly convex. First "segment" shorter than 

 second, second with flatly angled distal end, with deep anal depression. 

 Caudal rami of female and male (fig. QOh) as origionally described 

 except for additional small setule present on outer distal ventral 

 surface and hairlike process from middorsal surface. 



Male genital segment (fig. QOe) of varible shape, variation appear- 

 ing due to longitudinal contraction of free body segments. Dis- 

 tinct separation of fom'th pedigerous and genital segments in holotype 

 specimen, separation not visible in presently figm'ed specimen but 

 present in specimens exhibiting contracted condition. "Posterior 

 margin" of original description (p. 144) thus formed by cuticular 

 fold. Sixth leg (fig. QOg) present as small, naked setule and small 

 plumose setule, both situated immediately ventral to junction of 

 abdomen and genital segment. 



In the description of the appendages and processes given below, 

 those of the heretofore undescribed female are given only if they 

 differ from the male. Additional descriptions are given if there 

 appeared to be some error in the original description (Lewis, 1964a). 



Female and male antennule (fig. 61a) as originally described except 

 attachment to both frontal region and anterior-lateral ventral surface 

 of cephalothorax, not just to frontal region. Female antenna (fig. Qlb) 

 3-segmented, situated posterior and medial to antennule base. First 

 segment short, squat, with posteriorly directed lobate projection; 

 second segment broader proximally than distally, well developed. 

 Third segment indistinctly separable from clawlike terminal process, 

 with setule-like accessory process from proximal inner surface, second 

 from inner distal surface. Male antenna (fig. 61a) as originally de- 

 scribed except only one accessory process, on anterior inner surface. 

 Female postantennal process (fig. 616) situated lateral to antenna base, 



