101 



Pereopods III and IV are unusually long, their 2nd segment equal to 

 the 4th and 5th together; the 4th segment is much shorter than the 5th, 

 which in turn is slightly shorter than the narrower 6th segment; the claw 

 is strongly curved and half as long as the 6th segment. Pereopods V are 

 shorter than pereopods III or IV; the 2nd segment is only slightly longer 

 than the 6th but shorter than the 4th and 5th together. Pereopods VI 

 are the longest of all; the 2nd segment is equal to the 6th but shorter 

 than the 4th and 5th together, the latter segments being equal in length. 

 Pereopods VII are slightly shorter and weaker than pereopods V; the 4th 

 segment is longer than the 6th or the 4th and 5th together. In males pere- 

 opods VII are stronger than in females. The hypertrophy of the spoon- 

 shaped formation on the tip of the 6th segment of pereopods V-VII is 

 noteworthy; the distal end of these segments bulges and a cup-shaped 

 depression occurs into which the strong falcate claw retracts. 



The uropods have narrowly lanceolate, highly denticulate rami. The 

 telson is triangular with a rounded tip and does not reach half the length 

 of the basipodite of uropods III. 



Distribution: Tropical part of the Pacific Ocean (between the equator 

 and 23°30' S), Indian Ocean (between 5° S and the equator), and Atlantic 

 Ocean (madeira and Bermuda islands). It has been found in catches from 

 depths of 985-2,000, 1,900-3,300 m and in total catches from depths of 

 more than 1,800 m to the surface. 



5. Genus Pwlanceola Woltereck, 1907 



Woltereck, 1907: 7. 



Crustaceans of medium size. Body better proportioned than in other 

 lanceolids with a gammaridean appearance; the pereon is flat, not bulging 

 in males. The head is high, nearly equal to pereon somite I in length. The 

 eyes comprise a chain of eye spots (ocelli). Antennae I differ in structure 

 in males and females; in the female the peduncle is short and three- 

 segmented and the proximal segment of the flagellum is long, conical, 

 and tapers distally. Antennae II are markedly longer than antennae I, 

 with a multisegmented (5-6 segments) flagellum. The mandibles have a 

 narrow cutting edge, broad accessory plate, and a strong palp with its 

 3rd segment much longer than the 2nd. Maxillae I have a long palp and 

 a large oval inner lobe. Maxillae II have broad lobes. The Maxillipeds 

 have a large armed outer lobe and a well-developed separate inner lobe. 

 Pereopods I have a weakly developed chela, formed by the 5th and 6th 

 segments. Pereopods VI-VII have small, curved, retractile claws. 



Type species: Prolanceola vibiliformis Woltereck, 1907. 



1. Prolanceola vibiliformis Woltereck, 1907 (Figs. 29, 30) 

 Woltereck, 1907: 7, 1909: 157; Vinogradov, 1957: 198. 



