193 



longer than the 5th, or the 5th and 6th segments may be almost equal 

 and notably shorter than the 4th segment; the claw is very small and 

 slightly curved. 



The uropods are long and thin. The basipodite of uropods I is some- 

 what longer than the endopodite; the anterior and posterior margins of 

 both are armed with fine denticles and on the inner margin opposite to 

 the place of attachment of the expodite an isolated long curved spine 

 occurs; sometimes 3-4 such spines are present on the lower surface of 

 the basipodite. In the narrow uropods II the basipodite is shorter than 

 the endopodite; their ornamentation is similar to that of uropods I but 



162 the larger spines are absent. In uropods III only the anterior margin of 

 the endopodite and the posterior margin of the expodite are denticulate. 

 The telson is oval-triangular and short. 



The variability of the length ratios of the segments of the last two 

 pairs of pereopods is characteristic even of other species of this group, 

 particularly of S. rattrayi and S. wolterecki. 



Distribution: Found in the Atlantic Ocean from 45° 30' N to 34° S, 

 in the Indian Ocean north of 30° S and in the Pacific Ocean between 6 

 and 43° S, most reports are confined to the equatorial zone. It occurs in 

 catches from 200-500 m, in horizontal catches from depths of 400, 500, 

 660, 720, and 800 m, and in catches from depths of more than 1 ,000 m 

 to the surface. 



17. Scina wolterecki Wagler, 1926 (Fig. 77) 



Wagler, 1926: 372; Barnard, 1932: 261; Vinogradov, 1957: 215, 

 1962: 16, 1964: 136. 



Length of sexually mature females 7-9 mm, of males up to 10 mm. 



This species is close to S. oedicarpus and similar to it in external 

 features. 



The eyes are small. Antennae I are almost equal in length to the pereon 

 and pleon together. The maxillipeds differ sharply from those of all other 

 species of the genus Scina in the unusually narrow and long outer lobes, 



163 and in the inner lobes being reduced to small triangular-oval plates. 



Pereopods I and II are thin and weak; the 5th segment of pereopods I is 

 notably longer than the 6th while in pereopods II these segments are almost 

 equal in length. In pereopods III and IV the 6th segment is very thin and 

 shorter than the 5th, which is almost equal in length to the 4th. The length 

 ratios of the segments of pereopods V-VII are fairly variable. Pereopods V 

 are long but relatively shorter than in S. oedicarpus; the 2nd segment on 

 the anterior margin is armed with strong, slightly curved denticles and with 

 somewhat weaker denticles on the posterior margin; the distal process is 

 long, slightly curved and armed with fine denticles on the anterior margin; 

 the 5th segment is usually shorter than the 4th, being 2/3 its length; the 6th 

 segment is only 1/5-1/3 the length of the 5th although it may sometimes 



