THALIACEA 



683 



Fig. 480. A diagram of the budding of the first individuals of a colony of 

 Pyrosonia by the cyathozooid. A, B, C, Successive stages, at. atrial opening 

 of cyathozooid ; bd. bud ; stn. stolon. 



Fig. 481. The end of a stolon of Salpa democratic a-miicronata, showing part 

 of chain of young sexual individuals (blastozooids) about to be set free. From 

 Sedgwick, after Claus. at. atrial opening of a zooid; Af. anus; Br. "gill"; 

 C. heart; End. endostyle; M. mouth; N. ganglion; Nu. "nucleus"; Ov. 

 ovary; Wb. peripharyngeal band; Wg. ciliated funnel. 



