151 



existing differences are explained by age-dependent variations and the 

 schematic nature of Woltereck's illustration. 



Distribution: Indian Ocean (30°07' S, 87°50' E and 3° S, 66-67° E) 

 in catches from depths of 2,000-3,000 m. 



2. Genus Mimoscina Pirlot, 1933 



Pirlot, 1933: 2, 1939: 29. 



Medium-sized crustaceans. The integument is transparent. The head 

 has no rostrum and is higher than pereon somite 1 but not longer than 

 it. The proximal segment of the flagellum of antennae I is narrowly 

 conical, sometimes in shape approaching that in members of the family 

 Scinidae (M. gracilipes); its distal segments are developed to an equal 

 extent. Antennae II in females are reduced but not as strongly as in the 

 Proscina. The mandibles have a weakly developed accessory plate which 

 is shorter than the cutting edge. The spines on the distal margin of the 

 outer lobe of maxillae I are not divided into two groups. The outer lobe 

 of maxillae II is narrower than the inner and weakly armed. The outer 

 lobes of the maxillipeds oval, the inner lobes distally narrowing, and split 

 up to the base. The 5th segment of pereopods I and II is narrow, almost 

 linear; the claws of pereopods V-VII are small, curved, and retractile. 



Type species: Mimoscina gracilipes Pirlot, 1933. 



The genus includes two species. 



KEY TO SPECIES OF GENUS MIMOSCINA 



1. Basipodites of uropods I and II pubescent in distal part of outer mar- 

 gin. Pereopods VI-VII almost same as pereopods III and IV in width 



of segments and ornamentation 2. M. setosa (Barn.). 



— Basipodites of uropods I and II are not pubescent in distal part 

 of outer margin*. Pereopods VI-VII, unlike III-IV, very thin, rod- 

 shaped, and not armed 1 . M. gracilipes Pirl. 



1. Mimoscina gracilipes Pirlot, 1933 (Figs. 56, 57) 

 Pirlot, 1933: 2, 1939: 29; Vinogradov, 1962: 223. 

 Three not fully sexually mature females of this species are known; 

 length 4.5-8 mm. 



The head has a visor above the place of attachment of antennae I. 

 Antennae I are equal in length to six somites of the pereon; the proximal 

 segment of the flagellum is narrow, triquetrous, armed on each margin 

 with short denticles, as in the genus Scina; the distal segments are small 



Changed from Russian original by author — ^Eds. 



