209 



of the 3rd segment; the posterior margin of the 2nd segment is finely 

 denticulate; the 4th and 5th segments are equal in length or the 4th is 

 somewhat shorter; the thin 6th segment is roughly 1/4 shorter than the 

 5th; the claw is long and straight. Pereopods VI are somewhat shorter 

 than pereopods V; the anterior margin of the 2nd segment is armed with 

 sparse small denticles; the 6th segment is stronger and longer than in 

 pereopods V; it is longer than the 5th segment (or sometimes equal to 

 it); the 4th and 5th segments are roughly equal in length; the claw is 

 somewhat shorter than in pereopods V. Pereopods VII are weaker but 

 relatively longer. The length ratios of the 2nd, 4th, 5th, and 6th segments 

 are roughly 18:10:8:8; the claw is small and not strongly broadened at 

 the base. 



The uropods are broad and weakly armed. The basipodite in all 

 the uropods is longer than the endopodite. The exopodite of uropods I 



175 and II is reduced to a strong spine, as is characteristic of the remaining 

 species of the tullbergi group, except S. setigera. In uropods I only the 

 proximal part of the inner margin of the endopodite is finely denticulate. 

 In uropods II a large part of the posterior margin is denticulate and 

 opposite the place of attachment of the exopodite forms a sharp bend. In 

 uropods III the inner margin of the exo- and endopodite is denticulate. 

 The telson is triangular and with an acute tip. 



Distribution: Various regions of the Atlantic Ocean (from 28°04' N, 

 14°04' W and Bermuda Islands in the north to 32°08' S, 8° 28' E, and 

 33°23' S, 16° 19' E in the south), the equatorial and southern parts of the 

 Indian Ocean (up to 33°23' S, 16° 19' E), the central part of the Pacific 

 Ocean south of 30° N, and Antarctic waters (64° 29' S, 85° 27' E). It is 

 found in catches from depths of 200-500 m and in horizontal catches 

 from depths of 250, 300, 350, and 410 m. 



25. Scina damasi Pirlot, 1929 (Fig. 86) 



Pirlot, 1929: 80. Small species. Sizes not given. 

 The body lacks dorsal keels. Antennae I reach midbody. The mouth- 

 parts have not been described. 



Pereopods I are thin; the 6th segment is 2/3 the length of the 5th; 

 the claw is thin, long, and straight. The 6th segment of pereopods II is 

 longer than the 5th segment; the claw is shorter than in pereopods I. 



176 Pereopods III and IV are identical in structure; the 5th segment is longer 

 than the 4th; the thin 6th segment is 2/3 the length of the 5th segment; 

 the claw is thin and straight. The anterior margin of the 2nd segment 

 of pereopods V bears long curved denticles which give way to a long 

 distal process; the latter reaches half the length of the 4th segment; 

 the posterior margin of the 2nd segment is very finely denticulate; the 

 3rd-5th segments together are shorter than the 2nd; the 4th segment is 

 slightly shorter than the 5th and is almost equal to the 6th in length; the 



