172 



5th segment is slightly longer than the 6th while in pereopods II they 

 are almost equal and very thin. Pereopods III and IV are characterized 

 by broad 4th and 5th segments; moreover, the 5th segment is roughly 

 1.5 times longer than the rod-shaped 6th segment and roughly twice 

 longer than the distally broadened 4th segment. The 2nd segment of 

 pereopods V is narrow and armed on the anterior margin with long, 

 slightly curved denticles, while the posterior margin of the segment may 

 be either denticulate or bear similar denticles as on the anterior margin; 

 the strong, distal process is long, acute, slightly curved, falling just short 

 of the 4th segment and in length is nearly 1/4 the 2nd segment; the 

 anterior and posterior margins of this process also bear similar denticles 

 as on the anterior margin of the segment; the 4th segment is nearly 4/5 

 146 the length of the 5th segment, which in turn is roughly equal to the 

 6th. All the distal segments, especially the 6th, are very thin; the long 

 conical claws are slightly curved in the distal part and bear numerous 

 long setae on the anterior margin. Pereopods VI are notably shorter than 

 pereopods V; their 2nd segment is almost half the length but broader than 

 the 2nd segment of pereopods V; the 4th segment is shorter than the 5th, 

 which in turn is slightly longer than the 6th segment. Pereopods VII are 

 slightly shorter than pereopods VI; their 4th segment is slightly shorter 

 than the 5th, which in turn is shorter than the 6th segment. 



The uropods are narrow and long; the basipodite in all the uropods 

 is considerably longer than the endopodite, the expodite in uropods I is 

 reduced to a very small spine and in uropods II to a longer spine. The 

 anterior margin of uropods I is finely denticulate and the posterior margin 

 armed with sparse, long, slightly curved spines. The anterior margin of 

 uropods II is smooth while the posterior margin is finely denticulate. 

 In uropods III only the inner margin of the expodite and endopodite is 

 denticulate. The telson is triangular with an acute tip; its length is nearly 

 equal to its basal width. 



Distribution: This is a warm-water species known from various 

 regions of the Atlantic Ocean (from 53°07' N, 15°06' W to 31°21' S, 

 9°46' E) and from the northern part of the Indian Ocean (up to 29°43' 

 S, 90°02' E). In the Pacific Ocean it is found in the northern tropical 

 and equatorial regions (from 28°08' N, 141°08' E to 43° S , 158° W). 

 Sexually mature specimens were found in the 500-1,800 m layer and in 

 many through catches from depths over 1 ,000 m to the surface; however, 

 younger specimens were found in the 50-100 m layer. 



7. Scina borealis (G.O. Sars, 1882) (Fig. 65) 



G.O. Sars, 1882: 77 (Clydonia), 1890: 20; Bovallius, 1887b: 16 

 (Tyro), 1887c: 550 (Tyro); Wagler, 1926: 337, 1927: 94.— clausi Boval- 

 lius, 1885b: 14 (Tyro), 1887b: 18 (Tyro); Vosseler, 1901: 104. 



Length of sexually mature specimens reaches 7-8 mm. 



