174 



The mouth cone does not project markedly. The outer lobes of the 

 maxillipeds are long, tapering distally; the inner lobes are nearly half the 

 length of the outer and their distal margin is straight. 



The width of the segments and the degree to which the pereopods 

 and uropods are armed vary markedly. The claws of pereopods I and 

 II are long and thin. Pereopods III and IV are identical in structure; 

 their 6th segment is almost equal in length to the 4th and somewhat 

 shorter than the 5th; the claw is long and almost straight. Pereopods 

 V are the longest of all the pereopods, oblong-oval, or with parallel 

 margins; the 2nd segment has numerous large dt^nticles on the anterior 

 and posterior margins and a slightly curved, distal process that varies 

 in length from short to 2-3 times longer than the 3rd segment; the 4th 

 segment is equal to or slightly longer than the 5th, which in turn is much 

 (1.5 times) longer than the 6th segment. Pereopods VI are slightly shorter 

 than pereopods V; their 6th segment is somewhat longer than each of 

 the almost equally long 4th and 5th segments. Pereopods VII are longer 

 than the 2nd segment of pereopods VI; their 6th segment is considerably 

 longer than the 5th segment; the claw is short and curved. 



Uropods I bear a small number of strong, slightly curved spines 

 on the posterior margin and are finely denticulate on the anterior mar- 

 gin. Uropods II have a smooth anterior and finely denticulate posterior 

 margin. In uropods III both the anterior and posterior margins of the 

 basipodite are smooth but only the posterior margin of the exopodite. 



147 The length of the small triangular telson may be slightly more or less 

 than its basal width. 



The females have a brood pouch containing 60-80 eggs. 



Distribution: A panoceanic species. It is the most common and 

 numerous scinid inhabiting the temperate, cold-water, and tropical 

 regions. In the Arctic Basin it is found at 80° N, in the Antarctic in ice 

 right up to 65-72° S. It inhabits a wide range of depths; found in catches 

 from 50-100 to 2,000-3,000 m but is most numerous in the 200-1,000 m 

 layer. 



148 8. Scina spinosa Vosseler, 1901 (Figs. 66, 67) 



Vosseler, 1901: 108; Shoemaker, 1945a: 230; Vinogradov, 1957: 

 214, 1960a: 231, 1964: 132.— Wagler, 1926: 350 (spinosa subsp.), 

 1927: 95; Wagler, 1926: 352 (affinis subsp.).— uncipes Stebbing, 1904: 

 23; Wagler, 1926: 345 (uncipes subsp.). — lamperti Vosseler, 1901: 

 110. — uncipes lamperti Wagler, 1926: 348. 



Length of sexually mature females ranges from 5.5 to 10.5 mm, of 

 males from 8 to 9 mm. 



The body is thickset, without keels. The eyes are small. Anten- 

 nae I are strong but shorter than the pereon. The mouth cone protrudes 



