52 



segment; the curved claw is almost half the length of the 6th segment. In 

 pereopods VI the segments are almost equal in length but their claws are 

 relatively shorter. In the stronger pereopods VII the 4th segment is half 

 as long as the 5th; the claw is only 2/3 the length of the 6th segment. 



The basipodites of the uropods are 2/3-1/2 as long as their rami; in 

 uropods II they are very narrow and short; the rami are narrowly lance- 

 olate and denticulate along the margin. The telson is triangular, apically 

 rounded, reaching half the length of the basipodites of uropods III. 



Distribution: This is a widely distributed species, known from dif- 

 ferent regions of the North Atlantic (between 65 and 30° N) and southern 

 parts of this ocean (43° 20' S, 46° 02' W). In the Pacific Ocean it is 

 common in the northwestern regions (including the Bering Sea) between 

 60 and 40° N lat., but evidently is distributed more extensively since it 

 has been found along the coasts of South America (5° 57' S, 80° 50' W 

 and 27° 20'S, 117° 30' W). It is also found in the Indian Ocean, along 

 the coast of Sumatra. It inhabits meso- and possibly bathypelagic layers. 

 In the northwestern part of the Pacific Ocean, it is found in catches from 

 depths of 200-500 m, 300-500 m, and also in all catches from depths of 

 700 m, 1,000 m and more to the surface. 



2. Archaeoscina stebbingi Woltereck, 1909 



Woltereck, 1909: 154. 



Known from a single specimen, 3.0 m long, briefly described and 

 schematically illustrated. 



The main difference between A. stebbingi and A. steenstrupi is that 

 the 5th segment of pereopods I and II is much broader in the former 

 than in A. steenstrupi; Woltereck suggests that this difference might be 

 age-related. The 6th segment of pereopods I and 11 in A. stebbingi is 

 well developed and conical, not oval, in shape (may be the result of 

 Woltereck' s schematic drawing; he has allowed similar inaccuracies in 

 other instances). Finally, Woltereck mentions that in A. stebbingi the 

 highly curved 3rd segment of the mandibular palp is three times longer 

 than its 1 st and 2nd segments together, while in A. steenstrupi, according 

 to him, the length is no more than 1.5 times greater. It is this difference 

 that prevents us from considering the two species identical. 



Moreover, Woltereck, while comparing his specimen with that of 

 A. bonnieri (= A. steenstrupi) from the Bay of Biscay, found several dif- 

 ferences in the structure of the antennae: in A. stebbingi, antennae II have 

 narrow peduncular segments versus broad segments in A. steenstrupi; the 

 proximal segment of the flagellum of antennae I in A. stebbingi is five 

 times longer than the distal segments, while in A. steenstrupi the distal 



Changed from Russian text — Eds. 



