46 THE TAPE-WOKM. 



must, in many species, be enormous, since many hundred articu- 

 lations may still be counted, in cestoid worms which have, for 

 months, been giving off numerous joints every day. Whether a 

 cestoid worm, after giving off a series of sexless individuals as 

 joints, can, after a certain interval of rest, repeat this process, 

 would be a difficult fact to determine either in man or in animals, 

 since it is impossible to be sure if the renewed production of 

 joints springs from one and the same agamozooid, or whether it 

 may not be the product of a more lately immigrated one. 



