302 



apical gland. The ventral denticles comprise four to seven pairs, more 

 often five-six pairs. The mandibles have one highly developed central 

 denticle. 



The coxal spines of pereopods I-II are strong, long, and very acute. 

 The 2nd segment of pereopods I is equal in length to the rest of the leg, 

 with denticles present along the entire anterior margin and the distal 

 part of the posterior margin; the process of the 5th segment is equal to 

 the basal part of the segment or slightly longer than it, with denticulate 

 margins, and extends to the base of the claw; the 6th segment has a 

 straight denticulate posterior margin while the anterior margin is barely 

 convex with two denticulate keels terminating distally in large denticles 

 along both sides of the claw; the claw is evenly curved and slightly 

 longer than 1/3 the 6th segment. The 2nd segment of pereopods II is 

 just a little shorter than pereopods I and slightly longer than the rest 

 of the leg; the 5th segment is distally broadened; the process on the 

 posterior margin of the 5th segment is distinctly longer than the rest of 

 the segment, its width at the base more than half the segmental width 

 here, its margins denticulate, its tip extending to the base of the claw; 

 the 6th segment is narrow, longer than the 5th, and its ornamentation 

 similar to that in pereopods I; the claw is almost straight and 1/3 the 

 248 length of the 6th segment. The surface of the distal segments of both 

 these pereopods bears sparse setae. The 2nd segment of pereopods III 

 is carinate and equal to the whole pereopods II in length, being 10 

 times or more longer than wide, with strong denticles on the posterior 

 margin and weakly denticulate anterior chela; the 4th and 5th segments 

 are equal in length and coarsely denticulate posteriorly; the 6th segment 

 is the same length as the preceding segments but narrower and more 

 finely denticulate posteriorly, its distal end bulged in the mature female 

 because of the developed gland; the claw is barely curved and about 

 1/5 the length of the 6th segment; the surface of the 4th-6th segments 

 has sparse groups of thin setae. Pereopods IV are longer than pereopods 

 III; the 2nd segment is slightly broader than successive ones; the 6th 

 segment is longer than the 5th. Pereopods V are the longest due to 

 elongation of the distale segments; the 2nd segment is denticulate on 

 both sides and the distal denticle of the anterior margin reaches almost 

 to the end of the 3rd segment;the 5th segment is longer than the 4th, 

 anteriorly denticulate like it except for the narrowed distal part, evenly 

 curved forward; the 6th segment is narrow, highly elongated, and in a 

 folded condition reaches the middle of the 4th segment. Pereopods VI 

 are shorter than pereopods V by half the length of their 6th segment. 

 Pereopods VII have narrow 2nd-5th segments and extend to the end of 

 the 4th segment of pereopods VI or are slightly longer; the 2nd segment 

 is slightly constricted distally and five-six times longer than wide; the 



