94 



80 



Fig. 24. Distal segments of antennae I of (a) S. aestiva and (b) S. agassizi 

 (after Vinogradov, 1960a). 



The body is smooth with a very thin, finely faceted transparent 

 integument. The head is short and high, without a rostrum. The eye cups 

 are large and well demarcated; their anterior margin projects forward 

 behind the frons; the width of the commissure between the lower and 

 upper cups varies; the bottom of the cups in freshly caught specimens 

 has a dull metallic sheen. 



The structure of the appendages varies and evidently has no constant 

 characters that distinguish this species from S. aestiva. The exception is 

 the structure of the distal segments of the flagellum of antennae I: the 

 inner distal angles of the 1st and 2nd segments are drawn forward; the 

 3rd segment is conical, rarely narrows distally and is nearly two times 

 longer than the 2nd segment. 



Distribution: Found in the Pacific Ocean, in the Kuril-Kamchatka 

 Trench region, and in the south up to 23° 30' S. In the Indian Ocean it 

 is known from the northern regions (Arabian Sea) to 20° S. It inhabits 

 bathy- and abyssopelagic depths. Not found even once above 1,000 m; 

 the deepest record is the 5,000-6,000 m layer. 



3. Genus Megalanceola Pirlot, 1935 



Pirlot, 1935: 1, 1939: 8; Vinogradov, 1964: 114. 

 Large crustaceans, up to 75 mm in length. 



The body is massive, with a bulging or flattened but dorsoventrally 

 broadened pereon. The integument is thick. The head is shorter than 



