On Japanese freshwater Cyclopidae with 

 descriptions of two new species and 

 one new subspecies. 



BY 



Seiji Kokiibo, 



Agricultural College, Sapjoro. 



With Pl. IL 



In my study of Japanese freshwater copepoda, I have thus far 

 met with 8 species of the Cyclopidae, of which I propose to give 

 notes in this paper. The greater part of my material was collected 

 in several parts of Hokkaido, principally in the ponds and ditches in 

 and about Sapporo, in Lake Shikotsu, and in Lake Onuma ; the remain- 

 ing part was obtained in Lake Biwa (Prov. Orni), in Lake Kawaguchi 

 (Prov. Suruga), in several small ponds in Prov. Musashi, and in some 

 other localities. The specimens were thrown into formalin of about 

 4% strength at the time of capture and after 2-20 days were 

 transferred into JO% alcohol. 



I wish here to express my sincere thanks to Professor T. Fujita 

 for the many help extended to me during the work. 



Genus Cyclops Müller. 



1. Cyclops serrulatus Fischer. 

 Pl. II., figs. 1—4, 



Cyclops serrulaius Fischer 1851 ; Brady 1876; Schmeil 1891. 



This almost cosmopolitan species seems to be one of the most 

 common representative of the genus, being to be found in all 

 seasons of the year. It can not be confounded with any other 

 species on account of the characteristic shape of its egg-sacs. The 



