JOURNAL OF THE COLLEGE OF SCIENCE TOKYO IMPERIAL UNIVERSITY. 

 VOL. XXXV., ARTICLE 4. 



On Two Species of Aquatic Oligochseta, 



Jjimnodrilus gotoi hatai and IA/mnodrilus ivilleyi, n. sp. 



By 

 Ekitaro Nomura, Rigakushi. 



With 34 figures in text. 



Introduction. 



Since the appearance of Dr. Hatai's paper (1899) upon 

 Limnodrilus gotoi, which was abridged and cited the next year 

 by Dr. W. Michaelsen in ' Das Tierreich — Oligochaeta (1900),' it 

 has been generally recognised as a distinct species. Some time 

 ago specimens of an Indian Limnodrilus, which showed some 

 characteristic resemblances to L. gotoi Hatai, were handed over 

 by Dr. Willey, then the Director of the Colombo Museum, to 

 Prof. Watasé, with the suggestion that Prof. Goto or Dr. Hatai 

 study and report on them. These specimens were committed to 

 me by Prof. Goto, who also suggested the investigation of several 

 questions on aquatic oligochsetes. My studies on the subject 

 have brought out two principal results of systematic importance, 

 which may be stated at once as follows : 



1. Limnodrilus gotoi Hatai includes two species — L. gotoi 

 and L. willeyi, n. sp. 



2. Limnodrilus gotoi is also found in India. 



