82 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iis 



Measurements, — Five females and two males: 



female ^^g^g 



mean (mm.) range (mm.) {mm.) 



Greatest length, excluding setae 8.25 7.84-8.68 7.00, 7.49 



Greatest length of cephalothorax 4.14 3.92-4.41 3.92, 4.13 



Greatest width of cephalothorax 4.46 4.34-4.62 3.71, 3.85 



Greatest length of genital segment 2.69 2.24-3.01 1.82,2.03 



Greatest width of genital segment 3.04 2.94-3.15 1.82,2.10 



Greatest length of caudal rami 1.47 1.33-1.61 0.56, 0.56 



Greatest length of anal lamina 1.60 1.54-1.68 



Greatest length of abdomen 0.63, 0.70 



Greatest width of abdomen 0.49, 0.77 

 Length of egg string (1 female 



specimen) 2.94 



Diagnostic description.— Cephalothorax of female (fig. 10a) 

 consisting of cephalic maxilliped-bearing and first pedigeroiis seg- 

 ments, wider posteriorly than anteriorly; frontal region narrow, 

 lateral margins sharply rounded. Lateral cephalothoracic margins 

 flatly convex, medial posterior margin convex, lateral regions pro- 

 jecting shghtly past medial posterior surface. Eight denticulations 

 present on medial posterior surface. Ocular region visible as smoothly 

 irregular, clear portion in heavily pigmented anterodorsal surface 

 and irregular, darkly pigmented region just anterior to it. 



Cephalothorax of male (fig. 106) consisting of cephaUc, maxilliped- 

 bearing and first pedigerous segments, widest medially; posterolateral 

 regions extendmg well past flat-margmed medial posterior region. 

 Frontal region narrow, anterior margin wavy, with small median 

 depression. Anterolateral cephalothoracic margins deeply indented, 

 at junction of frontal region and cephalothorax, generall}^ flatly 

 convex posterior to indentation except for slight indentation in middle 

 of lateral margin. Cephalothoracic grooves present, extending ante- 

 riorly from each side of junction of cephalothorax and free second 

 pedigerous segment, terminating at indentation of anterior lateral 

 margin. Inner margins of posterolateral cephalothoracic regions 

 with filmy membrane extending medially and dorsally, covering most 

 of sinus formed by lateral cephalothoracic region and lateral margin 

 of second pedigerous segment. Additional membrane present on each 

 side of median posterior region and directed dorsally and posteriorly. 



Female second through fourth pedigerous segments (figs. 10c, d) 

 free, second pedigerous segment visible dorsally as narrow band 

 slightly overlapped anteriorly by posterior median cephalothoracic 

 region, bearing 4 small denticulations and 2 large lateral plates pro- 

 jecting laterally and posteriorly to middle of genital segment. Third 

 pedigerous segment also appearing as narrow band, overlapped medi- 

 ally by posterior end of second pedigerous segment and laterally by 



