CRUSTACEA WT1ITELEOOE. 1 33 



The merus is armed on its upper distal border with two spines 

 separated by a groove ; there are also two spiniforni granules 

 posterior to these, about the middle. 



The carpus has five more or less distinct rows of spines on its 

 outer and upper surface ; four of the rows form a reversed V 

 within a V, the larger V interrupted at its base near the articula- 

 tion with the hand. The fifth row occupies the upper margin 

 and consists of from four to six spines. 



On the external surface of the palm there are three or four 

 rows of spines, sometimes incomplete. 



The mobile finger is sulcate near its base, and has three rows 

 of subspiniform granules ; in the right chelipede of the male the 

 granules are scattered. 



The lower border and internal surface of the large hand are 

 smooth ; the left chelipede in both male and female has the lower 

 border granulose, and there is a longitudinal line of from four to 

 six granules on the inner median surface of the palm. 



The upper edges of the merus of the first three pairs of ambula- 

 tory legs are armed with three spines, two of which are curved 

 and situated about the middle ; the third is straight, and projects 

 at the distal extremity. The lower margins have a few spiniforrn 

 granules. The carpal joints of the first and second pairs of legs 

 are armed above with five spines, four of which are equal in size 

 and apart ; they are confined to the proximal two-thirds of the 

 upper edge ; the fifth spine is at the distal extremity. 



External to the spines on the crest of the carpus on the posterior 

 upper surface are situated four similar spines not extending beyond 

 the proximal half of the joint. These spines are bounded below 

 by a shallow longitudinal groove which is quite smooth and shining. 

 Both raerus and carpus of the fourth pair of legs are without 

 spines, excepting those at the distal extremities. 



Length of carapace of male 17mm. 



Breadth male 23mm. 



Length female 1 tram. 



Breadth ,, female 19rnm. 



PlLUMNUS PRUNOSUS, sp. nOV. 



(Plate vi., fig. 1, a, b.) 



The carapace is transversely and longitudinally convex ; both 

 it and the legs are clothed with a short down and stiff yellowish 

 brown hairs. The antero-lateral margins are longer than, the 

 postero-lateral. The surface of the carapace is smooth ; if the 

 hairs are removed the surface appears punctate, the pits being 

 the depressions from which the hairs originate ; regions scarcely 

 perceptible. 



