Jigures 24 and 2o show tJie elongated and contracted anterior 



r 



end of the redia. Just back of the collar, to the left, to 

 th right or dor sally the birth pore is located. It is 

 usually quite prominent. he mouth is looated at the 

 anterior end, immediately followed by a pharynx whioh varies 

 greatly in diameter due raoetly tc the size of the rediae. 

 However, the average diameter is about 0.08 maj. Xhe blind 

 intestine is olub -shaped and -about twioe the length of 

 Die di. -natter of the pharynx. 



The color of the redia varies frcm almost * transparent 

 condition to a heavy dark brown. the former condition is 

 only to be aeen in young or aotive rediae, the latter usually 

 in inactive and apparently very old rediae* The light 

 orange or light brown oolor whioh is the more cx>mmon, is to 

 be found in both the large and small, the young and old, 



the active and inactive rediae. 



>QM* fNtilift 



The aotivity ao stated varies jauoh the greatest being 

 in the younger rediae. In one oaee a newly freed daughter- 

 redi* measured on^y 0*180 mra. in its most oontraoted fora 

 (fig* 22), while extended it had a length of 0.405 am* 

 (fig. 23). There ia t however* au stated no looomotion f 

 rather only a swaying fro side to side using the posterior 

 protrasions as a pivot. 



Because the variation is so great, some might as^ if 

 all belonged to one species. The answer is that without 

 a question they all are the rediae of So nine etc ma revolutuou 

 The two main proofs are that from every type of rediae 

 the same oercaria merged having its definite shape, sise, 

 number of spines and arrangement of excretory ayetem and 



