78 



are well developed, their inner lobes, with a slightly tapering inner distal 

 corner, are unarmed. 



Pereopods I and II have a broadened 2nd segment. In pereopods I 

 the width of the 2nd segment is more than half its length; the 5th segment 

 is highly broadened distally and almost equal in length to the conical 6th 

 segment. The 5th segment of pereopods II is broadened distally, slightly 

 longer than the elongated-conical 6th segment. Pereopods III and IV are 

 identical in structure; pereopods III are slightly shorter than IV, their 

 2nd segment more highly broadened than in other species of Lanceola 

 but not as strongly as in pereopods I or II. Pereopods V have an oval, 

 medially broadened 4th segment whose maximum width is 2/5-1/2 its 

 length. Pereopods VI are longer than V, their 4th segment equal to the 

 2nd, slightly longer than the 5th and somewhat shorter than the 6th. 

 Pereopods VII are almost half the length of VI. 



The rami of uropods I and II are narrowly lanceolate; the basipodites 

 of all uropods, especially of II and III, are broadened. The telson has an 

 acute tip reaching the distal end of the basipodite of uropods III. 



Notes: Lanceola laticarpa differs from other species of the genus 

 in broader 2nd segment of pereopods I-IV, broadened 4th segment of 

 pereopods V, and a deep depression on somite I of the pleon. The long 

 pereopods VI and antennae II, as also the shape of the telson, which 

 reaches the distal end of the basipodite of uropods III, bring this species 

 closer to the L. sayana — L. pacifica group. However, in the structure of 

 antennae I it shows a distinct affinity for the L. clausi group. 



Distribution: Kuril-Kamchatka region and waters off New 

 Zealand — 32° S, 177° W. It is found in total catches from depths of 

 4,000 m and more to the surface. 



67 9. Lanceola clausi Bovallius, 1885 



Bovallius, 1885b: 8, 1887b: 40; Sars, 1900: 15; Shoemaker, 1945a: 

 209; Vinogradov, 1962: 10. 



Length of sexually mature individuals, judged from the abundant 

 material at our disposal, from different regions of the ocean, is 10-16 mm 

 for females and 9-14 mm for males. Some authors (Bovallius, 1887b; 

 Woltereck, 1927; Barnard, 1932) state that the length of sexually mature 

 individuals may reach 19-20 mm. 



68 The color of unfixed specimens is whitish, pink, sometimes orange. 

 The integument is thin. The body is smooth, without a longitudinal keel, 

 although the anterior margin of the somites of pereopods II-VI is some- 

 times thickened; the pereon is somewhat broad, at times bulging; the 

 pleon is relatively short. A rostrum is absent. The eyes, along the sides 

 of the head, are better developed than in the foregoing species. 



The flagellum in antennae I has an elongated-conical proximal seg- 

 ment; in sexually mature males it is often broadened at the base and 



