• r. -. r .{ 



-;i c.iA.i 



Phyllopod Crustacea of Japan. 

 By C. Ishlkawa. 



College of Agriculture, Imperial University. 



LIMNETIS BIFOEMIS, n. spec. 



Male.— Sliell smooth, oval, the anteriou end broader than the posterior. 

 -The dorsal edge less curved than the \-entral. The rostrum truncated in 

 front, the flattened edge of which forming an irregular equi-triiingle. The 

 frontal carnia high, especially at the point midway between the eye and the 

 anterior end (fig. 6). The first aaitennse (fig. 6 At.') consists of three joints, a 

 basal indistinct joint, a small median and a large terminal one, the last being 

 ■beset with numerous sense-hairs at its upper anterior edge. The. second 

 antennae with twenty-three-jointed upper flagellum and twent3^-eight-joiiited 

 lower one, the longest setae of which being nearlj'' as long as the flagellum. 

 The first maxillae small, consisting of an endite with four strongly toothed 

 spines and nine short ^eta^, and with a small brapphial sac. The endite is 

 similarly constructed as the first endite of other limbs. 



' Of the first leg -the comb (fig. 8, 1^) slightly higher than broad; its 

 palpiform appendage rather large. The sixth endite (P) is large, reaching to 

 the base of the fourth endite when bent down. The gill- (br) is a-lit-tle more 

 than half as large as the lower branchial lobe. ••' ' 



Only ten pairs of feet, the branchae being present till to the seventh 

 pair inclusive. 



The lateral view of the terminal segment of the body (fig. 10) narrow, 

 ending in three lobes : a small dorsal lobe, a large median, and a ventral, the 

 lower side of this last being again a little curved, 



