230 



dorsally ; the third joint, which is the longest, is not two-thirds the length of the 

 upper flagellum. 



The antennal peduncle is about the same length as that of the antencules : 

 the acicle is about as long as the eyestalk : the flagellum is about twice the 

 length of the carapace. 



The chelipeds are massive, quite equal, and about as long as the entire body 

 with the abdomen flexed in the natural position : not much more than a third of 

 their length is formed by the merus, which is slightly shorter than the hand. 

 They are more or less covered with long, stiff, golden yellow bristles, which are 

 specially thick-set on the under surface of the merus and the outer surface of the 

 wrist and hand : these bristles do not hide the rather coarse squamiform tubercles 

 from which they spring. There are some coarsish spines along the inner border 

 of the ischium, both the lower borders of the merus, and on a good part of the 

 outer surface of the wrist and hand. The fingers are spooned and have corneous 

 tips. 



The legs are stout and compressed, and their borders — and in the case of 

 the last three joints of the first two pairs, a considerable part of the surface also 

 — are more or less covered with stiff yellow bristles like those that grow on the 

 chelipeds. The first pair of legs are of equal length with the chelipeds. The 

 second pair are a little longer, and a third of their length is formed by the long 

 sabre-shaped dactylus. The third pair do not reach to the far end of the carpus 

 of the second pair : they terminate in a very perfect chela of comparatively large 

 size, with the dactylus anterior (or dorsal). The fourth pair reach just beyond 

 the far end of the merus of the third pair : they end in a very much smaller and 

 less perfect chela, with the dactylus posterior (or ventral;. 



The abdomen is a perfectly soft membranous bag, of which the segmenta- 

 tion is quite recognizably, but far from conspicuously, defined. In the male it is 

 symmetrical, though the minute or rudimentary appendages, that are present on 

 one side (right or left) of the 3rd, 4th and 5th segments, are represented on the 

 other side only by small tufts of small bristles. In the female its symmetry is 

 lost by the presence, on one side or other, of a large membranous leaf -like lobe 

 that forms a capacious cup-like brood-pouch. 



The first two pairs of abdominal appendages of the male end in convoluted 

 plates, the second pair working in the grooves formed by the first pair. 



The telson is quite symmetrical, and lies in the middle line, tucked up 

 against the ventral surface of the abdomen. On either side of it are the quite 

 symmetrical swimmerets* of the sixth pair : the basipodite of these has a spine at 

 its posterior angle : both the exopodite and endopodite are narrow slender and 

 falciform, with the anterior edge serrated and the tip spiniform : the exopodite 

 is many times larger than the endopodite. 



