446 PROCEEDINGS OF THE NATIONAL MUSEUM vol. us 



Carpus short, rounded dorsally, smooth, except for two tubercles or 

 teeth on inner margin. Platehke ridge ventrally with somewhat rough 

 edge. Chela covered with fine denticles, particularly on outer sur- 

 faces. Inner side of chela flat, outer rounded. Dactylus slightly 

 shorter than palm, with three teeth: one small, near junction with palm 

 and meshing with similar tooth on fixed finger; large conical tooth 

 near middle; terminal tooth meshing with truncate terminal part of 

 fixed finger. Fixed finger stout with wide cutting surface bordered on 

 each side with denticulated, elevated edge; both fingers end in sharp 

 tips that cross when closed. Distinct gape. 



Second leg (fig. 43) slender. Merus and ischium subequal, slightly 

 shorter than 5-jointed carpus, which has fu-st joint longer than fifth 

 and about equal to second, third, and foiu'th together, which are 

 subequal to each other. Fingers subequal to palm. 



Third (fig. 44) and fourth legs flattened with dilated merus. Is- 

 chium nearly ji merus in length. Distinct movable spines on merus 

 and ischium. Sparsely setose; single spine and setae on distal ventral 

 part of carpus, usually three equidistant spines and terminal pair on 

 ventral part of propodus. Few bristles dorsaUy. Needle-sharp 

 curved dactylus (fig. 45), more than % length of propodus. 



Fifth leg without movable spine on ischium, but one on undilated 

 merus. Kather sparse brush of bristles on distal part of propodus. 

 Dactylus similar to that of thu'd or fourth leg. 



First pleopod with round-tipped endopodite less than ji length of 

 exopodite. Second to fifth pleopods with exopodite slightly longer 

 than endopodite, both slender. Appendix interna stout and straplike. 



Uropod (fig. 28) broad and considerably longer than telson. Pe- 

 duncle with straight margin; two small teeth separated by serrated 

 spines graduated in length with longest medial. Proximal margin 

 of exopodite with serrated spines of varying lengths forming thatch 

 between small lateral tooth and large distal spine. 



Male. — With straight front. Cheliped (fig. 36) proportionately 

 heavier, wider than that of female (median tooth on dactylus may 

 be missing). Appendix masculina on second pleopod only slightly 

 longer than appendix interna, blunt tip armed with bristles of varied 

 lengths. 



Color. — "The carapace, abdomen and chelipeds are covered with 

 light tinted chromatophores in reds and blues, the fingers and telson 

 are tinted a light purple" (GlasseU, 1938). "Minute red and blue 

 spots" (MacGinitie and MacGinitie, 1949). 



Size. — Carapace length of smallest ovigerous female 5 mm.; largest 

 female 7 mm.; males 4.5-6.8 mm. Length of chela of largest female 

 6 mm.; of largest male 5.6 mm. 



