196 



in S. orientalis the distal process of the 2nd segment of pereopods V 

 reaches 1/3 the length of the 4th segment while in S. wagleri just to 

 its proximal margin; actually, judging from the illustration of the type 

 specimen of 5. wagleri supplied by Behning (1939) and from our mate- 

 rial on this species, the distal process of the 2nd segment in 5. wagleri 

 reaches 1/5-1/4 the length of the 4th segment. Moreover, in 5. orientalis 

 the length of the telson is roughly equal to its breadth, while in S. wagleri 

 the length of the telson is more than its breadth. Thus the differences 

 appear to be extremely unclear and constitute individual variation of the 

 characters of S. wagleri. 



The data available do not provide a basis for considering S. orientalis 

 as valid species. 



The species S. wagleri is divided into several subspecies whose char- 

 acteristics are given below. 



165 Scina wagleri wagleri Behning, 1939 (Fig. 78) 



Length of sexually mature females up to 5.5 mm. 



The characteristic structural features of the typical subspecies are 

 given in Table 12. 



Distribution: Deepwater part of the Sea of Okhotsk and that part 

 of the ocean surrounding the Kuril Islands, not farther than 200 miles 

 from them. The easternmost report is 49° 26' N, 158°42' E. In the north 

 it enters as far as the Kamchatka Strait, in the south up to 36° N 

 (35°43' N, 151°13' E). In the Sea of Okhotsk it is found at depths greater 

 than 500 m, in the Kuril-Kamchatka region in catches from depths of 

 1,000-2,000 m and in total catches from depths greater than 1,000 m to 

 the surface. 

 Scina wagleri abyssalis Vinogradov, 1957 (Fig. 79) 



Vinogradov, 1957: 217, 1970: 394. 



Length of sexually mature females 7.0-7.5 mm; males not known. 



This deepwater subspecies of S. wagleri, in general appearance, 

 structure of the mouthparts, pereopods, and ornamentation of the uropods 

 is similar to the typical subspecies; however, it differs from S. wagleri 

 wagleri in several features (see Table 12). 



Distribution: This abyssopelagic form is found only at depths greater 

 than 3,000 m (in catches from about 3,500, 4,200-7,800, 6,000-8,500, 

 0-8,500, and 0-9,400 m) in the Pacific Ocean in the region of the Kuril- 

 Kamchatka, Izu-Bonin and Kermadec deepwater trenches. The species 

 cought from all the three trenches are morphologically absolutely identical. 



Scina wagleri atlantis Thurston, 1976 



Thurston, 1976a: 154. 



Length of nearly sexually mature males 3.9-4.2 mm; females not 

 known. 



