448 



TOKIö KABURAK I : 



Fig. 2. Fig. 3. Fig. 4. Fig. 5. 



Fig. 2. Sorocelis Sapporo Ij. et Kab. 



Fig. 3 and 4. Planaria vivida Ij. et Kab. 



Fig. 5- Planaria gonocepjiala Dugcs. 



i intestine, g position of genital end-organs, 



p/i pharynx. / testis. 



In Professor Ijima's notes taken at the time of his collecting this 

 interesting specimen, it stands that the small daughter individual with 

 the head-end directed posteriorly in relation to the mother individual, 

 was passively dragged along as the latter crawled forewards, though 

 at times it made efforts to make foreward crawling in its own sense. 



Among PI. vivida obtained in the Nikko region I have found a 

 case which had the tail-end split into two. This is shown in fig. 3. 

 The right tail tip contains two lateral branches of the right posterior 

 gut-trunk, and may possibly be looked upon as a formation by bud- 

 ding. In another case of the same species (shown in fig. 4) the body 

 has produced, on the right lateral margin at about the level of the 

 pharynx insertion, an obliquely posteriorly directed process of a con- 



