453 



structure but the latter are longer; the 4th segment bears small spinules 

 (perceptible under high magnification) on the posterior margin; the 5th 

 and 6th segments have a denticulate posterior margin; the claw is thin and 

 long, more than half the length of the 6th segment. The 2nd segment of 

 pereopods V is oval, twice as long as wide, and bears five-seven readily 

 perceptible denticles in the distal part of the anterior margin; the 4th-6th 

 segments have a denticulate anterior margin; the claw is long, more than 

 half the length of the 6th segment. The 2nd segment of pereopods VI 

 has a slightly concave anterior margin, a bulged posterior margin, and 

 a rounded lobe in the distal part that bears one-three well-noticeable 

 marginal denticules; the 3rd-7th segments together are 2/3 the length of 

 the 2nd segment; the 4th segment is the longest and broadest, its anterior 

 margin cristate, and the distal process falls slightly short of the base of 

 the 6th segment; the 5th segment is short and broad. Of all the known 

 species of the genus Eupronoe only in E. armata does the 5th segment 

 have a small but always distinct rounded distal process; the 5th and 6th 

 segments have a denticulate anterior margin; the claw is about half the 

 length of the 6th segment. 



The last urosomite is wider than long. 



The rami of uropods I are denticulate on both margins but sometimes 

 the anterior margin of the exopodite is smooth. The rami of uropods II 

 and III have smooth margins that often taper distally. 



The telson is triangular, with a rounded tip and weakly bulged mar- 

 gins, and its width at the base is greater than its length. 



The body may be densely pigmented with stellate cells. Both the 

 pereon and the pleon are striated, having fine transverse furrows. 



Distribution: A surface warm-water, apparently circumtropical 

 species. It is known from the Atlantic (south of 43° N), Indian (environs 

 of Madagascar, Zanzibar), and Pacific (Kuroshio, Hawaiian Islands, 

 eastern tropical part) oceans. 



4. Eupronoe laticarpa Stephensen, 1925 (Fig. 197) 



Stephensen, 1925a: 161. 



Length of adult animals 4.5 mm. 



The head is approximately 1 .5 times higher than its width and ante- 

 riorly rounded, not stretched. 



The 4th segment of pereopods I lack distal processes and is highly 

 broadened in the distal part; the 5th segment is slightly broader than the 

 4th and its posterior distal process in the form of a rounded lobe; the claw 

 is half the length of the 6th segment. The 2nd segment of pereopods II 

 is much broader throughout its length; the 4th segment also lacks distal 

 processes; the 5th segment has a perceptible anterior distal process and 

 a strong posterior process that constitutes the immovable part of the 

 chela. Unlike the other species of this genus, in E. laticarpa the chela 



