THALIACEA 



605 



Fig. 455. A diagram of the budding of the first individuals of a colony of 

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

 of cyathozooid; hd. bud; stn. stolon. 



Fig. 456. The end of a stolon of Salpa democratica-mucronata, 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. 



