I. '21. 10 



The right cheliped is very much larger than the left. The 

 carpus, propodite and dactyl are covered with a coating of hair 

 usually forming a thick fur. The tips of the fingers, however, 

 are left bare. The fur is also present on the lower surface o 

 the merus, and sometimes on the upper surface. The form 

 of the chela varies considerably with the sex. Thus in the 

 female the hand is very broad, almost as broad as long, and is 

 roughly oval in outline. In the male, on the other hand, it is 

 much longer than broad, and the outer edge is more nearly 

 straight. The upper surfaces of the propodite, the carpus and 

 the merus are covered with rather sharp granules. There is a 

 row of small teeth on the outer edge of the dactyl. The lower 

 edges of the ischium and merus bear rows of rough tubercles. 

 The fingers, which are of about the same length as the palm, end 

 in small yellow claws. 



The left cheliped is much smaller and narrower than the 

 the right. It bears a similar coating of fur with practically 

 the same distribution on the various joints. The fur is thickest 

 about the palm and on the carpus. The upper surface of these 

 two joints bear a few scattered granules. The fingers are longer 

 than the palm. 



Both pairs of walking legs (second and third pereiopods) 

 are longer than the large cheliped, the second pair is larger 

 than the first, and the right leg of each pair is larger than 

 the left. 



In structure all these four legs are similar. The dactyl is 

 longer than the propodite, curved and, on the lower edge, 

 furnished with a row of about ten long, sharp spines. These 

 are placed at some distance apart and the spaces are greater 

 towards the distal end of the joint, which ends in a curved claw. 

 On the upper edge of the dactyl there is a row of very long 

 movable bristles which increase in number distally. On the 

 inner face of the joint, and nearer the upper than the lower 

 edge, there is another row of stiff bristles arranged in groups of 

 two or three. The dactyl is very slightly twisted. The 

 other joints of the walking legs are all compressed, their upper 

 and lower edges roughened, but unarmed except for a single 

 small spine on the anterior upper end of the carpus. Groups 

 of setae spring from the roughened edges, especially those on 

 the dorsal side. 



The fourth pereiopods are of the form usual in these ap- 

 pendages in the Paguridae. The imbricate scaly area on the 

 propodite is only two scales deep. 



The imbricate area on the fifth periopods, which are minu- 

 tely chelate, is rather small. 



The pleopods vary very much according to sex. 



In the male there is a pair of slender appendages, modified 

 for sexual purposes, on the first abdominal segment. They 

 are directed forwards and are pressed closely against the ven- 

 tral surface between the coxae of the fourth and fifth pairs of 

 pereiopods. Their bases are widely separate but they almost 



