451 



one is shorter and the posterior greatly variable in length — sometimes 

 this process reaches only the middle of the 5th segment, sometimes 

 its distal end; the 5th segment is 2/3 the length of the 4th, equal in 

 length and width, and bears spines along the posterior margin; the 6th 

 segment attains maximum width in the middle, has a bulged anterior 

 margin, and an almost straight and finely denticulate posterior margin; 

 the claw is long and thin. The 2nd segment of pereopods II is slightly 

 broadened; the 4th segment is wider than long and has rounded anterior 

 and posterior processes in the distal part, of which the latter is somewhat 

 larger; the 5th segment is somewhat broader than the 4th, its length less 

 than half its width; the anterior distal process is pointed and terminates 

 in a spine; the posterior distal process constitutes the immovable part 

 of the chela, has denticulate margins, and its pointed tip falls slightly 

 short of the base of the claw; the 6th segment attains maximum width 

 in the middle, narrows toward the tip, and both its margins are bulged. 

 The 2nd segment of pereopods V is oval and twice longer than wide; in 

 front of the base of the next segment there is a distal projection which 

 reaches the base of the 4th segment; the 4th and 5th segments are equal in 

 width but the 5th is longer; the claw is thin, curved, and slightly shorter 

 than half the length of the 6th segment. The anterior margin of the 2nd 

 segment in pereopods VI is straight but with a rounded projection in its 

 proximal part, the posterior margin bulged, and the distal margin straight 

 or slightly concave; the 3rd-7th segments together are half the length of 

 the 2nd segment; the 4th segment has a distal process with a rounded tip 

 that reaches the base of the 6th segment; the claw is short; the 4th-6th 

 segments have a denticulate anterior margin. 



•Both rami of uropods I have a pointed tip and denticulate mar- 

 365 gins; the endopodite is somewhat longer than the exopodite. The rami 

 of uropods II and III have a smooth rounded tip, are broadened in the 

 distal part, weakly developed, and not denticulate. 



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

 gins; its length is somewhat more than its width at the base and almost 

 half that of the last urosomite, whose length and width are equal. 



Distribution: Often found in the surface waters of the tropical zone 

 of the World Ocean. It is known from the Atlantic (south of 38° N., 

 region of the Canary Islands, Gibraltar), Indian (northwestern Australia), 

 and Pacific (north of New Zealand, equatorial part, Hawaiian Islands, 

 Kuroshio) oceans, and the Mediterranean Sea. It inhabits the upper 100 m 

 layer. 



367 3. Eupronoe armata Claus, 1879 (Fig. 196) 



Claus, 1879b: 28; 1887: 52; Stephensen, 1925a: 159; Spandl, 1927: 

 llA.—serrata Claus, 1879b: l"^.— intermedia Stebbing, 1888: 1517. 

 Length of adult animals up to 8 mm. 



