572 



461 



Fig. 248. Amphithyrus muratus Volkov, sp.n., male. 



rounded distal process reaching 1/3 the length of the 5th segment; the 

 5th segment is relatively longer than in A. similis and A. bispinosus; the 

 6th segment is shorter than the 5th. Pereopods VII consist of a single 

 2nd segment, which is narrow, with parallel margins, and almost not 

 broadened. 



The basipodite of uropods I is almost half the length of the rami. 

 The basipodite of uropods II is 1.2-1.3 times longer than the rami. The 

 basipodite of uropods III is fused with the endopodite. The telson is 

 shorter than the last urosomite, its length equal to its width at the base, 

 and its tip rounded. 



Distribution: Found in the waters of Kuroshio (34° N, 147° E) and 

 Nasca ridge. 



4. Amphithyrus glaber Spandl, 1924 (Fig. 249) 



Spandl, 1924: 40.— inermis Bovallius, 1887a: 48. 

 Length of adult individuals 2.5-3.0 mm. 



