116 



armed with thin setae. Pereopods VII with short, curved, partly 

 retractile claw capable of forming with 6th segment a weakly 

 developed subchela 3. M. mixta Vinogr. 



1. Mimonecteola beebei Shoemaker, 1945 (Fig. 37) 



Shoemaker, 1945a: 124; Vinogradov, 1956: 199, 1957: 204, 

 1964: 119. 



Length of sexually mature males 10.5 to 11 mm, of females 11 to 

 12 mm. 



The color of unfixed crustaceans is olive-green. 



In sexually mature females the 5th and 6th segments of pereopods II 

 are relatively narrower than in immature specimens or in males. Pere- 

 opods III and rV are identical in structure but pereopods IV are some- 

 what longer; their distally broadened 4th segment is half the length of 

 the narrowly amygdaloid 5th segment; the narrow 6th segment is slightly 

 longer than the 5th; the almost straight and strong claw is 2/7-1/3 the 

 length of the 6th segment. Pereopods V in females are slightly longer 

 than pereopods IV, while in immature specimens or in males they may 

 be equal to or shorter than pereopods IV. Possibly,^ these are individual 

 differences and are not sex related. The 4th segment of pereopods V is 

 slightly shorter than the 5th segment, which in turn is equal to or slightly 

 shorter than the 6th; the claw is strong and straight. Pereopods VI are 

 longer and stronger than pereopods V; their 4th segment is 1/2-2/3 the 

 length of the 5th segment; the 6th segment is longer than the 5th. Pere- 

 opods VII are much shorter and weaker than pereopods VI; their 4th 

 segment is 2/3 the length of the 5th segment; the 6th segment is much 

 longer than the latter; the claw is straight. 



Uropods I and II have narrowly lanceolate rami. 



Uropods III may have broadly or narrowly lanceolate rami. The tri- 

 angular telson is 1/2-2/3 the length of the basipodite of uropods III. 



Notes: Some differences are apparent among specimens from the 

 Atlantic and Pacific oceans. In the latter specimens the 5th segment 

 of pereopods II is slightly shorter, pereopods V in some specimens are 

 102 shorter and not longer than pereopods IV, the rami of uropods III are nar- 

 rower, and the telson is about 1/2 and not 2/3 the length of the basipodite 

 of uropods III. But as all these characters are subject to individual dif- 

 ferences, we do not consider them sufficient for taxonomic separation of 

 the Pacific and Atlantic ocean crustaceans. 



Distribution: Atlantic Ocean (region of Bermuda Islands). Common 

 in the northwestern pait of the Pacific Ocean north of 38° N (including 

 the Sea of Okhotsk and the Bering Sea). In the Atlantic Ocean these 

 crustaceans have been found in through catches from 1,900 m up to 

 the surface; in the Pacific Ocean they inhabit depths of the meso- and 



