28 BULLETIN OF THE 



spines. The carpus is more than half as long as the.merus, compressed and 

 very slender to near the distal end where it is expanded and thickened for the 

 articulation of the chela and armed above with a single acute spine and below 

 with one or two small teeth, and along the whole length of the dorsal edge 

 there is a distinct but narrow sulcus. The chela (PI. IV. fig. 8) is about as 

 long as the merus, and the digits themselves considerably longer than the 

 basal portion, which is about as broad as but much thicker than the proximal 

 part of the merus, though still strongly compressed ; the dorsal edge is evenly 

 rounded, and projects in a small tooth and an acute spine above the articu- 

 lation of the dactylus ; the inferior edge projects slightly proximally and then 

 retreats at the base of the propodal digit, and except near the proximal end is 

 occupied with a shallow sulcus, the edges of which are armed with several 

 minute spines directed distally. Both digits are compressed, very slender, 

 and regularly tapered to acute and very strongly curved extremities ; the dorsal 

 edge of the dactylus is flattened, but scarcely sulcated, and the inferior edge of 

 the propodal digit is flattened and slightly sulcated near the base, but rounded 

 distally ; the prehensile edges of both digits are armed throughout with a close- 

 set series of very short and very stiff setae. 



The legs of the second pair are slender, densely ciliated along the edges, and 

 reach to the tips of the peduncles of the antennae. The basis is anchylosed with 

 the rather short ischium. The merus is considerably longer than the ischio- 

 basis and reaches to the edge of the carapax. The carpus is a little shorter 

 than the merus. The basal part of the chela (fig. 9) Ls a very little longer 

 than the carpus, and is flattened and somewhat expanded distally, where it is 

 a third as broad as long ; the propodal digit is very slender, nearly as long as 

 the basal portion of the chela, nearly straight to the slender, acute, and chiti- 

 nous tip, which is strongly curved, and the prehensile edge is thin and armed as 

 in the first pair. The dactylus is almost exactly of the same form as the pro- 

 podal digit, and its prehensile edge is aimed in the same way, but the cilia 

 upon the outer edge are much longer than on the corrosponding part of the 

 propodus. 



The third and fourth pairs of legs are successively a very little shorter than 

 the second, and have very nearly the same form. From the coxal to the meral 

 segment they are very nearly as stout as in the second pair, but the three distal 

 segments are much more slender. The basal part of the chela (fig. 10) is sub- 

 cylindrical and only very slightly expanded and flattened distally, while the 

 propodal digit and the dactylus are nearly equal in length, very slender and 

 weak, straight throughout, without incurved or chitinous tips, and densely 

 ciliated along the prehensile edges. 



The fifth pair of legs (figs. 11 and 12) are considerably shorter and more 

 slender than the fourth, and all the segments except the propodus and dactylus 

 have very nearly the same relative proportions as in that pair. The basal por- 

 tion of the propodus is alike in the two sexes, a little longer than the carpus, 

 subcylindrical and slightly tapered distally. The digits diff'er in the sexes. 

 In the male (fig. 11) the propodal digit is about as long as the proximal 



