104 



the inner margin, are two rows of long and one row of short setae; the 

 inner lobe has a tapered inner distal angle and is slightly pubescent. 



Coxal plate I is oval and slightly tapers distally. The 5th segment of 

 pereopods I is notably broadened distally and almost equal in length to 



89 the 6th segment; its lower anterior angle is stretched into a lobe; the 6th 

 segment is likewise broadened distally, its upper and lower distal angles 

 stretching into rounded lobes, projecting behind the base of the straight and 

 strong claw; the 5th segment of pereopods II is not broadened distally, it is 

 slightly broader than and 2/3 the length of the 6th segment. Pereopods III 

 and IV are identical in structure; their 2nd segment is equal in length to 

 the 4th and 5th segments together; the 6th segment is slightly longer than 

 the 5th and 1.5 times longer than the 6th. Pereopods V are much longer 

 than pereopods III and IV, and somewhat longer than VI; the rod-shaped 

 4th segment is equal in length to the 2nd but much narrower than it; the 

 weak, slightly curved 6th segment is less than 1/2 the length of the 5th and 

 1/4 the 4th segment; the claw is small, slightly curved, and nonretractile. 

 Pereopods VI are shorter than V; the width of the 2nd segment is 1/3 its 

 length; the 4th segment is broadened distally, 1.5 times longer than the 5th 

 and equal in length to the thin 6th segment. Pereopods VII have almost 

 the same length ratios as pereopods VI but are much weaker; the width of 

 the 2nd segment is 1/4 its length. 



The endopodite of uropods I is 2/3 the length of the basipodite, in 

 uropods II almost equal to it, and in uropods III longer than it. The telson 

 is slightly longer than the basipodite of uropods III. 



Distribution: This is a widely distributed but fairly rare species. In 

 the Pacific Ocean some specimens have been found in the region of the 



90 Kuril-Kamchatka Trench, along the coast of Peru, and in the central part 

 (20°20' N, 173°24' E; 43° S 158° E) of the Ocean. In the Indian Ocean 

 it has been found at the Cocos Islands and south of the Seychelles. It 

 has not been reported from the Atlantic Ocean. Found in catches from 

 the 1,500-2,000 m layer (Kuril-Kamchatka region) and in total catches 

 taken from depths of more than 2,000 m to the surface. 



III. Family CHUNEOLIDAE Woltereck, 1909 



Medium to large crustaceans, reaching a length of 40 mm. The body is 

 massive, usually dorsoventrally compressed to a variable degree. All the 

 pereon somites are free. The head is roughly equal to or (together with 



91 the rostrum) slightly longer than somite I of the pereon. The eyes are 

 rudimentary or absent. Antennae I are short, equal in length to the head, 

 sometimes shorter or slightly longer than it. The proximal segment of 

 the flagellum is short, often vesicular; the distal segments are very small, 

 often inconspicuous. Antennae II are shorter than antennae I, rudimen- 

 tary, with a vesicular peduncle. The mandibles lack palps in both sexes; 



