42 



HTLJROZOA. 



Reproductive processes of Hydrozoa:— a — d, simple processes of 



body-wall, variously modified, containing generative organs; e m, 



more complex series of reproductive bodies, each giving rise to a 

 gonoealyx : — ^, portion of body-wall ; /*', wall of gonocalyx ; .u", 

 inward projecture of p.', or veil of gonocalyx ; k', simple diverti- 

 culum of the somatic cavity; «, lateral prolongation of the same, 

 forming one of the gonocalycine canals ; k", cavity of manubrium; 

 p, spermaria or ovaria. (These drawings are diagrammatic.) 



