NOTES ON THE FEEE-LIVING NEJfATODES. 



467 



growth. After this, a prolonged period of egg-formation 

 appears likely, for posterior to the spermatozoa there is a 

 single row of developing egg-cells (ov.'') gradually diminishing 

 in size and quantity of yolk, till in the middle of the limb the 

 ovary becomes an undifferentiated syncytium. In this gonad 



Text-fig. 9. 



Text-fig. 10. 



OV.2 



Sp. 3 



ev.3 



sp 2. 



ov. I. 



SP.I. • 



Sp.O. -v-- 



10. 



.© 



:& 



<2> 



Oo , 



o o' 

 ooo\ 

 ono ,._ 



oo< 



o 



.oO| 



ooy 



loo. 



)oor 





;iO;v; 



we have at one time the evidences of three alternations of 

 male and female activity within a very limited period. 



In the second individual figured (Text-fig. 10) maturity is 

 rather further advanced. The results of the early activity 

 of the gonad are large numbers of spermatozoa and a few 

 eggs. A series of developing ova now promise a long period 

 of female productivity. There is an interesting departure 



