THALLOFHYTA: ALGAE 



17 



Fig. 6. Group of golden-brown algae. A, Chromulina ovalis, X 1,450; B, Chrysamoeba 

 radians, X960; C, Synura uvella, X600; D, Dinohryon sertularia, X900; E, Hydrurus 

 foetidus, X480; F, Phaeothamnion confervicolum, X-440. (A and B, after Klebs; C, after 

 Stein; D, after Senn; E, after Berthold; F, after G. M. Smith.) 



Another group composed almost entirely of flagellates are the Crypto- 

 phyceae, yellow-green and brown forms that store food as starch or a 

 related substance. Motile cells have two unecjual cilia (flagella). 

 Reproduction occurs by fission. Sexual reproduction has been reported 

 in only one species. The Cryptophyceae comprise only 30 species, 

 mostly occurring in fresh water, and are rarely seen. In some respects 

 they resemble the next class. 



