CHRYSOPHYCOPHYTA 277 



(a) Motile unicells which are either naked or else enclosed in a 

 dehcate membrane, e.g. Desmokontae and the imarmoured 

 Dinoflagellates. 



{b) Motile unicells with a conspicuous cellulose envelope of 

 sculptured plates and with the flagella furrows well marked, 

 e.g. armoured Dinoflagellates — Peredinium, Ceratium. 



(c) Parasitic marine forms which are either ecto- or endopara- 

 sites. 



{d) One palmelloid genus, Gloeodinium. 



{e) Colourless and rhizopodial forms. 



(/) Coccoid forms, e.g. Dinococcales. 



{g) Filamentous forms, e.g. Dinothrix, Dinoclonium. 



Recent work has tended to show that there is no real evidence for 

 believing that this group is closely related to the Diatomaceae as 

 was formerly supposed. 



REFERENCE 



General 



Fritschj F. E. (1935). Structure and Reproduction of the Algae, Vol I, 

 pp. 664-720. Camb. Univ. Press. 



