DECAPOD CRUSTACEANS OF THE WEST INDIES 



77 



without exopods. Fingers of chelae of first and second pereiopods 

 bearing terminal tufts of long hair. Carpus of second pereiopod much 

 longer than broad. Last three pereiopods without prominent horny- 

 scales or tubercles. Merus of third pereiopod not noticeably broader 

 than that of fourth. Appendix masculina on second pleopod of male 

 with deep, unarmed sinus in sinuous posterior margin. A small species, 

 maximum postorbital carapace length about 7 mm. 



Color in life. — Ground color semitranslucent wdth pale greenish 

 to bluish-green suffusion, and entire color pattern in shades of blue. 

 Dorsal and dorsolateral portions of carapace with mottled blue but 

 with clear dorsomedian longitudinal stripe extending from rostrum 

 to telson; anterolateral area posterior to antennal spine wdth dark 



Figure IS. — Potimirim glabra, female (carapace length 5.8 mm) from Dominica station 26. 



blue, M -shaped mark. Posterolateral surface of branchical region 

 with longitudinal hght stripe extending anteroventrally from level of 

 base of abdominal pleuron and, at level of base of first pereiopod, 

 broadening and extending anterodorsally over M -shaped mark to 

 orbit; pair of irregular spots, one in Hght area and one below it at level 

 of base of first pereiopod; pair of subhnear spots flanking lateral 

 light band just posterior to expanded Hght area; larger dark spot 

 situated anterodorsal to upper subhnear spot; postero ventral portion 

 of branchial region with two prominent spots, more dorsal one con- 

 tiguous with lower posterior margin of Hght band, and ventral one 

 antero ventral to latter and situated above base of fifth leg; ventral 

 haK of branchial region mottled with faint submarginal stripe. Tergum 

 of first abdominal somite with two subequal, paired, rectangular bands 

 flanking dorsomedian light band and extending ventrally almost to 

 base of pleura; second abdominal tergum with broad anterior and very 



