228 FLOYD E. CHIDESTER. 



The winter egg capsule of Platiaria simplississima is a dark 

 brown, elongated object, with a horny covering. It bears nothing 

 so far as I could discover that would aid in holding it fast. 

 Several capsules were opened carefully by means of sharp needles 

 and the contents examined. There were perhaps a score of eggs 

 and many nutritive cells. 



Summary. 



1. Planaria shnplississima produces winter eggs. 



2. A single individual may develop three or more capsules 

 during the winter, 



3. Complete regeneration of tissue lacerated at the extrusion 

 of the &gg capsule is effected in about one week. 



4. About three weeks elapse between two successive extrusions. 



