The Sympoda. 145 



spines on the nearly parallel-sided hinder half ; in the nearly adult 

 male the telson is longer than in the female, with a narrower 

 base. 



First antenna with serrate edge to the large first joint, third joint 

 small, and in the male not longer than broad, flagelluni in the female 

 of five or six joints, with accessory of three joints, the third micro- 

 scopic ; in the male the flagellum is four-jointed, with accessory of 

 three well-developed joints. Second antenna of the female small, 

 four-jointed, with a seta on the rather large first joint and another 

 on the small second joint ; second antenna in the male showing a 

 flat process on the side of the penultimate joint of the peduncle, the 

 last joint long, probably composite, the flagellum long, annulated, 

 the very numerous short rings not having attained their full 

 development. 



The first peraeopod has the second joint much curved, with its 

 convex border distally serrate. The second peraeopod has the 

 second joint shorter than the succeeding joints combined, of which 

 the strongly spined fifth is longer than the short sixth and long 

 narrow seventh together. The third and fourth peraeopods have the 

 second joint more dilated in the male than in the female, in cor- 

 respondence with the exopods well developed in the former sex but 

 reduced to two-jointed rudiments in the latter ; the third joint of the 

 third perffiopod in the male shows no sign of the peculiar flattened 

 spines found in adult males of northern species belonging to this 

 genus. 



The three pairs of pleopods in the male with short apical setae 

 may be taken to represent a subadult character. 



Peduncle of the uropods in the female longer than the telson with 

 its apical spines and longer than either ramus ; in the male it is sub- 

 equal to the telson with its spines and shorter than the rarni ; of 

 these the exopod is a little the shorter, with the first the longer 

 of its two long joints ; the endopod has its first joint much 

 longer than the two following joints combined, these two being 

 subequal in the female, but the second shorter than the third in 

 the male. 



Length S'5 mm. 



Locality. Cape Point N. 81 E. 32 miles; No. 1738G, sent by 

 Dr. Peringuey. 



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