12 C. ISHIKAWA, PHYLLOPOD CRUSTACEA. 



basal third, and with a fijiely serrated spine at th3 point one-third from its 

 base to the tip and in the same hne with the feathered setae, while the dorsal 

 posterior half of the appendage is also finely serrated till to a short distance 

 from its terminal end. 



In the Female (fig. 2) the first antemite are relatively a little shorter, the 

 sense-setae less developed, the second antenuae with fifteen joints on the upper 

 flagellum and with sixteen on the lower. The finger-shaped terminal pro- 

 jection of the fifth endite of the first leg (fig. ij.V) relatively shorter, that of 

 the first being smaller than the sixth endite, and provided with about fifteen 

 sensory setae on the tip of it, and is found till to the ninth appendage, the 

 entire number of this projection being thus equal in both the sexes. The 

 branchia exists till to the twenty-third appendage, whereas the twenty -fourth 

 appendage (fig. 8) has an enditic lobe with five setce between the first endite 

 and the flabellum, l)oth of which are similary constructed as those of the male 

 appendage. 



The specimens were collected by Mr. Yasushi Nawa in shallow waters 

 near Gifu, central Japan, in the month of May 1893, and were kindly sent to 

 me in alcohol. 



