214 



longer than the 5th, which in turn is shorter than or equal to the very 

 thin and slightly curved 6th segment; the claw is small, thin, and slightly 

 curved. Pereopods VI are only slightly shorter than pereopods V but have 

 different length ratios; the 4th segment is usually longer than each of the 

 distal segments; the length ratios of the 2nd, 4th, 5th, and 6th segments 

 are 13:10:5:6; although the 6th segment may be relatively somewhat 

 longer, this segment is somewhat thinner than the 5th; the claw is small 

 and falcate. Pereopods VII are relatively well developed; the 4th and 6th 

 segments are roughly equal to each other and both are somewhat longer 

 than the 5th segment; the claw is small and falcate. 



In uropods I the basipodite is roughly equal to the endopodite; the 

 inner margin of the endopodite and the distal end of the posterior margin 

 of the uropod is finely denticulate. In uropods II the basipodite is some- 

 what shorter than the endopodite; the posterior margin has very small and 

 thin spines. In uropods III the basipodite is considerably shorter than the 

 endopodite (sometimes less than half its length); the inner margin of the 

 exopodite and both margins of the endopodite bear thin and dense spines. 

 The telson is unusually long, reaching 1/2 the length of the basipodite 

 of uropods III, its length is two or three times its basal width; its tip is 

 rounded. 



Distribution: Known from several records from the tropical regions 

 of the eastern part of the Atlantic Ocean (from the Azores and Canary 

 Islands to the Gulf of Guinea). It is not found in the Indian Ocean. In the 



179 Pacific Ocean it is found in the region of the Kermadec, Bougainville, and 

 Kuril-Kamchatka deepwater trenches. It enters Antartic waters (64°03' S, 

 161°59' E; 63° 18' S, 135° 14' E). In the northwestern part of the Pacific 

 Ocean it is found in catches from depth of 500-1,000 m, in the Canary 

 Islands in horizontal catches from a depth of 500 m. All the remaining 

 reports pertain to total catches from depths of several thousand meters 

 to the surface. 



28. Scina typhlops Wagler, 1926 (Fig. 89) 



Wagler, 1926: 407; Vinogradov, 1957: 218, 1962: 18. 



Length of specimens close to sexual maturity 3.0-3.5 mm. 



The body is without keels, head and the first five somites of the 

 pereon broad. The eyes are not noticeable. Antennae I are strong, armed 

 along the edge with long denticles, and somewhat shorter than the pereon. 



The mouth cone is small. Maxillae I, as in S. latifrons and S. pusilla, 

 are well developed. The protopodite of the maxillipeds is trapezoid, 

 broad, and short; the outer lobes are broadly oval and short, with a 



180 more or less developed notch in the distal part of the inner margin; the 

 shape of the lobes is variable; the inner lobes are small with a rounded 

 tip and bear two apical (sometimes fairly strong) setae. 



