1914-] S.Kemp: Notes on Crustacea Decapoda. 109 



The first peraeopods (fig. 6) differ from those found in most 

 Hippolytidae in being slender ; they reach a little beyond the eyes. 

 The ischium is short and the merus, which is rather strongly- 

 curved, is one and a half times the length of the carpus. The 

 carpus is four times, and the chela, which is a little longer, is four 

 and a half times as long as broad. The length of the dactylus. 

 excluding its spines, is contained nearly two and a half times in 

 that of the palm. The armature of the chela is, I believe, unique. 

 The fingers (fig. 7) bear no teeth on their inner margins, but the 

 apex of each is truncate. At the end of the fixed finger there are 

 three large blunt spines, curved near the tip, arranged side bv 

 side in a transverse row ; the dactylus is similarly armed, but 

 bears only two spines which, when the claw is closed, fit into 

 the interstices between those of the opposing segment. All the 

 spines are movable. At their base, on either side both of the 

 dactylus and of the fixed finger, there is a tuft of long setae 

 which are shortly plumose; two of these setae, situated alongside 

 the dactylar spines but on a slightly lower level, are stouter than 

 the rest and probabl}' assist in grasping. 



The second peraeopods (fig. 8) are more normal in structure. 

 They reach to the apex of the rostrum and are stouter than those 

 of the first pair. The merus, the middle of the three segments 

 composing the carpus, and the chela are approximately equal in 

 length. The first carpal segment is equal to the third and the two 

 combined are a little longer than the median segment. The 

 dactylus is about two- thirds the length of the palm. There are 

 no teeth on the inner edges of the claw, but the fixed finger has 

 an angulate prominence a little behind its middle point. The 

 limb bears scattered plumose setae. 



The last three pairs of legs are similar ; the third reaches to 

 the end of the antennal scale and the fifth to the anterior third of 

 the carapace ; all are densely beset with long plumose setae. In 

 the third pair (fig. 9) the merus is about four times as long as 

 wide ; it bears a stout spine at the distal end of its inferior 

 margin and movable spinules on its upper edge. The carpus is 

 massive and the protuberance at the distal end, overhanging the 

 articulation with the propodus (found in most Hippolytidae) is 

 very strongly developed ; the total length of the carpus is nearly 

 three-quarters that of the propodus. In the fifth leg the merus is 

 much broader, about twice as long as wide, but the proportions 

 of the other segments are much the same. The dactylus is very 

 peculiar. In the third and fourth pairs it consists of a very 

 short basal portion to which four large teeth are attached. Two 

 of these lie in the same plane (the normal plane of the dactylus), 

 while the others, which are a little smaller, are attached one on 

 each side. In the fifth pair the arrangement is similar, but the 

 lateral teeth are, in one specimen, reduced to small conical 

 processes. 



The abdominal somites are obscureh- furrowed transversely 

 and their inferior margins bear short spines. These are most 



