528 



setae with groups of small denticles between them. The 2nd segment 

 of pereopods V is broadened, oval, 1 .5 times longer than wide, and the 

 anterior margin indistinctly denticulate with short spiniform setae; sim- 

 ilar setae occur on the anterior margin of the remaining segments and 

 are interspersed with groups of small denticles; the 6th segment is long 

 and equal in length to the 3rd-5th segments together. The 2nd segment 

 of pereopods VI has a characteristic shape: the anterior margin is proxi- 

 mally bulged, medially and djstally straight and slightly denticulate, the 

 distal margin straightly truncate, and the posterior distal angle sharply 



426 stretched backward, pointed, and sometimes with a proximally bent tip; 

 the distal segments are the same as in the preceding pereopods but the 

 6th segment is relatively shorter. Pereopods VII reach only the middle 

 of the 2nd segment of pereopods VI and are five-segmented; the 2nd 

 segment has a straight anterior margin, highly bulged posterior margin, 

 and its width is 2/3 its length; the distal three-segmented part of the 

 pereopods is almost half the length of the 2nd segment. 



In the epimeral plates the posterior distal angle is pointed and 

 strongly stretched. The basipodite of uropods I is distally denticulate 

 on the outer margin; the rami are equal to the basipodite in length, 

 almost do not differ mutually, their margins irregularly denticulate with 

 large denticles alternating with groups of smaller ones, and the tips 

 of the rami reach the tips of uropods III. Uropods II are shorter than 

 uropods I, mainly because the basipodite is less than half as long as in 

 pair I; the margins of the rami are denticulate; the endopodite is broader 

 than the exopoditc. Uropods III are the same length as the basipodite 

 of uropods I; the basipodite is wider than its length but shorter than the 

 rami; the endopodite is fused with the basipodite and strongly broadened 

 proximally; the exopodite is narrower and somewhat shorter than it; the 

 margins of the rami are denticulate. The telson has a pointed or blunt tip. 



Distribution: A rare species. It is distributed in the surface waters of 

 the indo-west Pacific (Malayan Archipelago, Great Barrier Reef, north- 

 eastern part of the Indian Ocean). 



6. Genus Glossocephalus Bovallius, 1887 



Bovallius, 1887a: 35; 1890: 105; Steuer, 1911: 12; Stephensen, 1925a: 

 202; Chevreux and Page, 1925: 432; Spandl, 1927: 196; Bowman and 

 Gruner, 1973: 51— Elsia Giles, 1887: 250. 



The body has a thin integument. The head is relatively short, in 

 females and young males spherically bulged, with a small roundish ros- 

 trum, and shorter than the first four somites of the pereon; in larger males 



427 the head is elongated and not bulged, its length approximately equal to 

 the first four somites of the pereon. 



