154 Annals of the South African 



made in the northern species. The fifth pleon segment is very long 

 and narrow, the telson as long as the sixth segment, the terminal 

 part much narrowed, carrying an apical pair of spines attended by a 

 very small subapical pair. 



The first antennae have a stout peduncle, the third joint short, 

 with circular process bearing the usual brush of filaments, from 

 among which springs the slender flagellum, of five joints, the 

 second the longest, the fifth minute ; in the four-jointed accessory 

 the first joint is shorter than the second or third, the last minute. 

 The second antennae have a long slender peduncle, the second joint 

 much longer than its neighbours, the fifth nearly thrice as long as 

 the second. The flagellum missing. 



The mouth organs are of delicate structure. Upper lip emarginate. 

 Mandibles with strong molar and ten spines in the spine-row. First 

 maxillae with narrowly ended plates and bisetose palp, the third 

 maxilliped with second joint much longer than the next five joints 

 combined. 



First pereeopods with long and remarkably bent second joint ; 

 rest of the limb missing. Second peraeopod with second joint bent, 

 stout, not distally narrowed, much shorter than the five following 

 joints combined, sixth joint as long as the fourth, seventh consider- 

 ably shorter than fifth. Third peraeopods with second joint distally 

 narrowed, much longer than following joints together, one margin 

 strongly serrate. Fourth peraeopod like the third, but with second 

 joint considerably shorter. Fifth perseopod slender throughout, 

 second joint longer than the other five combined. 



Pleopods with the peduncles not tapering as in L. macrurus but 

 parallel-sided, the exopod minute, especially in the first pair, and the 

 endopod of that pair much shorter in proportion to the breadth than 

 represented by Sars for his species. Peduncle of uropods about 

 twice and a half as long as the telson, but considerably less than 

 twice the endopod, of which the first joint is longer than the second 

 but shorter than the third, with 4, 3, 3 spines on the inner margin 

 and a much larger apical spine ; exopod broken. 



Length of specimen, adult male, about 5 mm. 



Locality. Cape Natal N. by E. 24 miles ; depth 805 m. ; No. 

 12605, sent by Dr. Peringuey. 



