JOURNAL OF THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY, TOKYO. 

 VOL. XXXVIII., ARTICLE 2. 



A Monograph of Japanese Ophiuroidea, arranged 

 according to a New Classification. 



By 



Hikoshichirô Matsumoto, 



Lecturer in the College of Science, Tohoku Imperial Univei"sity, Sendai. 



With 7 Plates and 100 Figures and 1 Chart in Text. 



Introductory. 



The marine fauna of Japan is interesting by reason of its 

 peculiar faciès due to the mingling of tropical and arctic elements. 

 This peculiarity is also apparent in the ophiuran fauna, which is 

 by no means poor in species. The Japanese ophiurans in the 

 collection of the Zoological Institute of the Imperial University of 

 Tokyo number more than one hundred species, but they have not 

 been thoroughly studied. Dr. Izuka was the first Japanese zoologist 

 who undertook a study of this group, and he was followed by 

 Mr. Kawamuea, who has kindly handed over to me his drawings 

 and separates of several valuable papers in his possession. To 

 Dr. Izuka also I am indebted for the use of some publications, 

 and to both gentlemen for helpful advices. 



