166 



3. Scina curilensis Vinogradov, 1956 



Vinogradov, 1956: 203. 



The color of freshly fixed specimens is white with reddish pigment 

 cells. 



The pereon is oblong-oval, smooth; a low dorsal and two lateral 

 keels are present on the pleon and urosomite I. 



Antennae I are longer than the pereon but shorter than the pereon and 

 pleon together. Antennae II in males have a five-segrnented flagellum. 



The outer lobes of the maxillipeds are elongated-oval and armed 



with a row of short setae at the distal end and along the inner margin; 



142 the inner lobes are apically straightly truncated and bear two short setae; 



in males the inner lobes are roughly 1/4 and in females 2/5-1/3 the length 



of the outer lobes. 



The distal process of the 2nd segment of pereopods V is long and 

 slightly curved; there are two denticles on its anterior margin, the remain- 

 ing part of the anterior side of the segment is denticulate; the posterior 

 side of the segment has large curved denticles; the 4th segment is almost 

 equal in length to the 5th; in males the claw is short and curved, in 

 females almost straight. Pereopods VI are slightly shorter than pere- 

 opods V; the 4th segment is 1.5 times longer than the 5th and more 

 than twice longer than the 6th segment; the claw in females is straight, 

 in males curved. Pereopods VII are weak; the 4th segment is insignif- 

 icantly longer than, and the 6th almost half the length of the 5th; the 

 slightly curved claw is 2/5 the length of the 6th segment. 



Uropods I and II are finely denticulate on the posterior margin. 

 Uropods III have a smooth posterior margin. The telson is roundish- 

 triangular; its height is equal to its width at the base. 



Scina curilensis curilensis Vinogradov, 1956 (Fig. 61) 



Vinogradov, 1956: 203 (pro sp.). 



Sexually mature specimens 15-17 mm in length. 



Pereopods I and II: in females the 2nd segment is shorter than the 

 5th and 6th segments together; in males the 5th segment is longer than 

 the 6th, in females it is almost equal to the 6th. Pereopods III and IV 

 are identical in length and structure; the 2nd segment is 2/3 the length 

 of the 4th and 5th together; the length of the 4th, 5th, and 6th segments 

 is almost similar-the 5th segment is only insignificantly longer and the 

 6th shorter than the rest; the claw is straight and long. The 2nd segment 

 of pereopods V is denticulate only on the anterior margin; the slightly 

 curved 6th segment is 1/2 the length of the 5th segment. 



Distribution: Bearing (up to 62° N) and Okhotsk seas and the adjoin- 

 ing cold-water Kuril-Kamchatka region of the ocean. It does not enter 

 the warm waters of Kuroshio. The southernmost record is 42° 30' N, 



