400 



groove, which, on the middle of the palm, occupies the greatest part of the outer surface, is 

 bounded inferiorly by a ridge that runs parallel with the rounded, lower border of the palm 

 and that is most conspicuous in the middle. Proximally this groove is limited above by an 

 inconspicuous ridge, defining the oval area, but not reaching beyond it. Both the upper and 

 the lower border of the palm are fringed at the inner side with hairs, like in other species. 

 Examined under a lens, the palm appears finely granular, but the groove is nearly smooth, 

 like also the fingers. 



Merus of the larger cheliped of the female 4-times as long as broad, for the rest as in the 

 male, but the denticles of the infero-external margin and the subacute tubercles on the upper 

 half of the outer surface and on the upper margin are somewhat larger. Carpus and chela as 

 in the male, but the chela somewhat shorter, little longer than the carapace. 



Merus of the small cheliped of the male 3,5-times as long as broad, for the rest resembling 

 that of the large, but the granules and tubercles are smaller. Chela slightly shorter than the 

 other (proportion between the length of the chelae 1,13), palm slightly compressed, 3-times as 

 long as high and hardly longer than the fingers; upper border of the palm without a transverse 

 o-roove near the dactylus, outer face also with a shallow groove reaching on its lower half 

 from the carpal articulation to that of the fingers and defined inferiorly by a little prominent 

 ridge. The long, pointed extremities of the fingers are crossing one another, the dactylus is 

 Balaeniceps-^ha^ndi, its upper surface resembles a spoon, when looked at from above, the 

 distal half being elliptical, the proximal half constricted. Palm and proximal half of the fingers 

 finely granular under a magnifying-glass. 



Of the small cheliped of the female the merus is 5-times as long as broad, for the 

 rest it ao-rees with that of the male, but the denticles on the infero-external margin and 

 the subacute granules and tubercles on and near the upper border are larger. Chela a little 

 shorter than the small chela of the male (proportion 1,25); the palm which is slightly shorter 

 than the fingers and nearly 3-times as long as high, resembles that of the small chela of 

 the male, but the groove on the outer face is inconspicuous; fingers slender, tapering and 

 shutting together. 



Carpal segments of the second legs of the male 0,92 mm., 1,14 mm., 0,45 mm., 0,5 mm. 

 and 0,46 mm. long, the second segment lo-times as long as thick in the middle; chela 0,7 mm. 

 long (palm 0,28 mm., fingers 0,42 mm.). In the adult female the carpal segments are 0,96 mm., 

 1,16 mm., 0,48 mm., 0,58 mm. and 0,52 mm. long, the second segment 9-times as long as 

 thick; chela 0,83mm. long (palm 0,35 mm., fingers 0,48 mm.). These numbers indicate that 

 the carpus is slender, that the 2"^ segment is one-fourth or one-fifth longer than 

 the 1=', that the 4"^ is slightly longer than the subequal 3"^ and 5'i^ and that the chela, the 

 fino-ers of which are in the male one and a half, in the female one and one-third longer than 

 the palm, is a little shorter than the i^' segment of the carpus. 



Ischium of 3"^ and 4"' legs unarmed. Merus of 3''^ legs unarmed, slender, 8 — 9-times 

 as long as broad in the middle ; carpus also slender, propodus one-fourth longer than the carpus, 

 straight, not narrowing distally, its posterior margin with 7 or 8 spines; dactylus slightly curved, 

 not broader than high, pointed, half as long as the carpus and two-fifths of the propodus. 



26S 



