VII 



I offer likewise my thanks to the director of the Zoological department for 

 the kindness with whiclr he opened to me all those parts of the Daigaku collec- 

 tions under his care. 



Finally I add my thanks to my assistants, past and present, for the aid 

 given me in making these researches, Messrs Sekino, Kato, Kochibe and Kishi, 

 to whom I must add the names of two of the students of the Daigaku, Mr. 

 Yamashita and Mr. Fiijitani. 



Tokio. December ISgO. 



Tlie Author. 



