586 



somewhat longer than in pereopods II, and straight or barely curved in 

 front; the 4th segment is shorter than the 5th but longer than the 6th; the 

 claw is thin. Pereo- pods IV are analogous in structure except that the 

 4th-6th segments are longer. In pereopods V the lower margins of the 

 coxal plate are roundish, the inner process rather short and broad at the 

 base; the 2nd segment is oval and 1.7-1.9 times longer than wide; the 

 3rd-7th segments together are equal to the 2nd in length; the 4th segment 

 is much shorter than the 5th, the 6th segment longer than the 4th but 

 shorter than the 5th. The 2nd segment of pereopods VI has a geminate 

 tubercle in the proximal part of the anterior margin, the anterior margin 

 is barely concave medially, and bears sparse long setae in the distal part; 

 the posterior margin has bulged proximal and distal halves; the maxi- 

 mum width of the proximal half of the 2nd segment is 1.2-1.3 times the 

 maximum width of the distal half; the 3rd-7th segments together are 1/4 

 the length of the 2nd; the 4th segment is linear and has a well-developed 

 distal process; the 5th segment is narrower and almost half the length 

 of the 4th; the 6th segment is equal to the 5th in length but much nar- 

 rower; the claw is thin, pointed, and 1/3 the length of the 6th segment. 

 Pereopods VII have a full complement of segments; the 2nd segment is 

 narrow and long; the 3rd-7th segments together are much shorter than 

 the 2nd but individuals are encountered in which the distal segments are 

 almost equal to the 2nd segment in length. 



The basipodite of uropods I is distally broadened and its anterior 

 margin denticulate almost throughout its length; the rami are lanceolate; 



472 the endopodite is longer than the basipodite, and the exopodite is shorter. 

 The basipodite of uropods II is half as long as in uropods I; the rami are 

 lanceolate; the endopodite is almost twice as long as the exopodite and 

 longer than the endopodite of uropods I. The basipodite of uropods III 

 is wider than long; the endopodite is two-four times longer than the 

 exopodite and its tip reaches slightly beyond the tip of the telson. The 

 telson is triangular, has a rounded tip, and its length is 2/3 its width at 

 the base. 



Distribution: Known from the Atlantic (from 45° N to 36° S), Indian 

 (Arabian Sea; 21° S, 58° E), and Pacific (Kuroshio, region of Peru, 

 equatorial zone, eastern part, and north of New Zealand) oceans, and 

 Mediterranean and Red seas. Inhabits the upper 200 m layer. 



473 2. Parascelus edwardsi Claus, 1879 (Fig. 255) 



Claus, 1879b: 18; 1887: 46; Spandl, 1924: 42; 1927: 26A.— parvus 

 Claus, 1879b: 20; 1887: 47; Stebbing, 1888: 1500; Stephensen, 1925a: 

 211. —nasutus Bovallius, 1887a: 44.— zebu Stebbing, 1888: 1496; Shoe- 

 maker, 1925: 46; Stephensen, 1925a: 211. — typhoides ? Hurley, 1955: 

 183. 



Length of adult specimens 5-7 mm. 



