JOURNAL OF THE COLLEGE OE SCIENCE, TOKYO IMPERIAL UNIVERSITY. 



VOL. XXXIX., ART. 9. 



Description of Some Japanese Polyclad Turbellaria. 



By 



Megumi YERI, Bigakushi, 



Zoological Laboratory, Nara Higher Normal School for Women, 



and 



Tokio KABURAKI, Bigakushi, 



Zoological Institute, Science College, Tokyo Imperial University, 



With 2 plates and 48 textfigures. 



Very little has hitherto been known of the Polyclad fauna of 

 the Japanese coasts. Our studies on the group, obtaining material 

 chiefly from the neighbourhood of Misaki and in part from the 

 coasts of the provinces Awa and Suruga, have thus far revealed 

 twenty-six species, of which seventeen seem to be new to science 

 and which may be referred to fourteen genera. It is now proposed 

 to give in the following brief descriptions of all the forms studied. 

 Certain forms found by Yeri — including what appeared to be a 

 Cestoplana sp. and an Acelis sp. — are left out of consideration in 

 this paper, since the specimens were not in a state fit for close 

 study or exact identification. It is exceedingly probable that a 

 more intensive search in the same regions will bring to light many 

 more new and interesting forms. 



Here we beg to express our hearty thanks to Professor I. Ijima 

 for many valuable aid rendered us during the work. It may also 

 be mentioned here that the collecting of the material and the 

 original preparation of all the figures embodied in this paper were 

 made by Yeri several years ago. 



