JOURNAL OF THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY 

 TOKYO, JAPAN. 



VOL. XVII., ARTICLE 4. 



On the Development of Lhigula anatina. 1 



By 



Naohidé Yatsu, Rigdkushi. 



1. The substance of this paper was presented as a dissertation on my graduation from 

 Science College in June 1900; since that time some new facts have been added by further 

 investigation. 



