GENERAL ZOOLOGY 



f- Epidermis 



Oocytes 



Fig. 10.7. Aspects of sexual reproduction in Hydra allenuatn. .1, male with well-developed 

 testes (and a youns;. asexual bud). B, longitudinal section of a sine;le testis showina; stashes 

 in maturation of gametes. C, lone;itudinal section throuE;h a portion of an ovarv, showins; 

 stages in oogenesis. D, a mature o\um resting in the remains of the ovarv. /:", female 

 bearing six mature ova. /'", female loearing fertilized eggs, two of which are undergoing 

 cleavage. (From P. Brien and M. Reniers-Decoen, 1951, Annales de la snciele rnyale 

 Zoolo^ique de heloique, vol. 82.) 



298 



