igoS,] Records of the Indian Museum. 221 



mm. without it, the sixth segment of the abdomen is 2*4 mm. long, 

 ahnost two-thirds the length of the carapace without the rostrum. 

 The telson (fig. 3), distinctly longer than the sixth segment, reaches 

 almost to the level of the spine on the outer margin of the exopodite 

 of the caudal fin ; the strongly tapering telson terminates in a 

 slender, acute, median point or spine, the short, subterminal, outer 

 spinules hardly reach to the middle of the median spine, but the 

 inner spinules are almost twice as long as the median point. The two 

 pairs of spinules on the upper surface are situated on its posterior 

 half. 



The shortest of the three antennular flagella extends by one- 

 third of its length beyond the antennal scales. The spine at the 

 outer margin of the antennal scales, is placed near the obtuse, 

 oblique tip of the blade ; the distance between the extremity of 

 the blade and the tip of the spine measures onl}^ tV-tV the length of 

 the outer margin of the scale. 



The legs of the first pair are slightly shorter than the antennal 

 scales ; carpus and merus are of equal length and one-fifth or one- 

 sixth longer than the chela (fig. 3a), which is four times as long as 

 broad, and the fingers of which are a little longer than the palm. 

 In one of the largest specimens the merus of first legs is i'4 mm, long, 

 the carpus 1-45 mm. ; the chela is i*2 mm. long and 0*29 mm. broad. 



The legs of the second pair are equal and extend with the fin- 

 gers beyond the antennal scales (fig. 36). Merus a little broader, 

 but slightly shorter than the ischium, together as long as the chela. 

 The carpus, which gradually thickens distally, measures two- thirds 

 the length of the ischium and appears also distinctly shorter than 

 the merus ; its thickness at the distal end is about one-fourth its 

 length. The chela much resembles that of L. ^£'ww//'^s, Hend. (Hen- 

 derson, ''A Contribution to Indian Carcinology," 1893, pi. 40, 

 fig. 14). The chela appears, in the largest specimens, just as long as 

 the carapace without the rostrum ; the palm, which is somewhat 

 inflated, is very slightly longer, but much thicker than the carpus, 

 whereas the elongate, slender fingers are once and two-thirds as long 

 as the palm ; the fingers have sharp cutting edges, but no teeth, and 

 their apices are strongly curved inward ; the palm appears in the 

 middle once and a half as thick as the distal end of the carpus. 

 The whole leg seems to be smooth. In one of the largest speci- 

 mens ischium, merus, carpus, palm and fingers are respectively 

 2*04 mm., 175 mm., i"36 mm., i'46 mm, and 2*4 mm. long; 

 in a younger specimen, about 17 mm, long, these numbers are, 

 in the same order, i'6 mm,, i"4 mm,, i'02 mm,, i*02 mm,, and 

 174 mm,, the palm appearing here just as long as the carpus. 



The three other legs are very slender and in the largest speci- 

 mens reach slightly beyond the antennal scales. The measure- 

 ments of a leg of the fifth pair (fig. 3c) of a specimen 18 mm. long 

 are as follows : merus i*86 mm. long and 0*14 mm. broad, 

 13 times as long as broad ; carpus 0'85 mm. long, propodus 2 mm. 

 long and o"i mm. broad in the middle, 20 times as long as broad; 

 dactylus 0*85 mm, long, 0"i mm. broad near the propodal articulation, 



