NOTES ON JAPANESE TRICLADS. 



449 



siderable size and an irregular contour. It shows a pair of eyes near 

 the junction with the mother body. From the state of things it is 

 probable that we have here to do with an abnormal state of budding. 



Finally, as regards PI. gonocephala it may be recorded that 

 specimens with double tail-ends, one of which might be regarded as a 

 budding product of the other, are not infrequent. In fig. 5 is represent- 

 ed a case, in which an individual has budded out, from the right 

 margin of the posterior parts, a daughter individual. Of the latter, the 

 free end is the head-end ; though still eyeless, it is already provided 

 with a distinct pharynx and with three gut-trunks which have mani- 

 festly arisen from two adjoining lateral branches of the right posterior 

 gut-trunk of the mother body. 



