162 ^ CENTURY OF PROGRESS IN THE NATURAL SCIENCES 



Family Pyrophacaceae Lindemann (1928, p. 96) 



Syn.: Glenodiniopsidaceae Schiller (1935, p. 80) 

 Family Glenodiniaceae (Scliiitt) Lemmermann (1899, p. 361) 



Syn.: Kyrtodiniaceae Schilling (1913, p. 12); Dinosphaeraceae Linde- 

 mann (1928, p. 84; cf. Schiller, 1935, p. 99) 

 Family Peridiniaceae Ehrenberg orth. mut. Engler (1892, p. 6) 



Syn.: Krossodiniaceae Schilling (1913, p. 30) 

 Family Goniaulaceae Lindemann (1928, p. 84) 

 Family Congruentidiaceae Schiller (1935, p. 320) 

 Family Protoceratiaceae Lindemann (1928, p. 83) 

 Family Ceratiaceae (Schiitt) Lindemann (1928, p. 91) 



Syn.: Heterodiniaceae Lindemann (1928, p. 95; cf. Schiller, 1937, pp. 



327-432) 

 Family Goniodomaceae Lindemann (1928, p. 94) 

 Family Ceratocoryaceae (Schiitt) Lindemann (1928, p. 98) 

 Family Oxytoxaceae (Schiitt) Lindemann (1928, p. 97) 

 Family Cladopyxiaceae (Kofoid) Poche orth. mut. Lindemann (1928, p. 

 99) 



Family Ostreopsiaceae Lindemann (1928, p. 96) 

 Family Podolampaceae (Schiitt) Lindemann (1928, p. 100) 

 Family Lissodiniaceae Schiller (1937, p. 480) 

 Order RHIZODINIALES Pascher (1931, pp. 320, 326) 

 Family Amoebodiniaceae Pascher (1931, p. 326) 



Syn.: Dinamoebaceae Pascher (1916b, p. 135) 

 Order DINOCAPSALES Pascher (1914, p. 151) 



Family Gloeodiniaceae Pascher ex Schiller (1937, p. 482) 



Syn.: Dinocapsaceae Pascher (1914, p. 158), nomen nudum 

 Order DINOCOCCALES Pascher (1914, p. 151) 



Family Hypnodiniaceae Pascher (1931, p. 326), nomen nudum 

 Family Phytodiniaceae Klebs (1912, p. 443) 



Syn.: ?Pyrocystaceae (Schiitt) Poche orth. mut. West (1916, p. 55); 



Dissodiniaceae Graham (1951, p. 116), nomen nudum 

 Family Protaspidaceae Skuja (1939b, p. 116; cf. Skuja, 1948, p. 375) 

 Family Stylodiniaceae Pascher (1931, p. 326), nomen nudum 

 Order DINOTRICHALES Pascher (1914, p. 151) 



Family Dinotrichaceae Pascher (1914, pp. 151, 158, 160; 1927a, pp. 2-15; 



1931, p. 326) 



Family Dinocloniaceae Pascher (1927a, p. 15; 1931, p. 326) 



Classes of Uncertain Systematic Position 



CLASS CRYPTOPHYCEAE 



Characterization: This class embraces less than two dozen genera of highly special- 

 ized, asymmetrical, compressed, usually flagellated, pigmented or rarely colorless, uni- 

 cellular organisms. The cells have a firm periplast but lack a wall. The flagella, of which 

 there are two, are of slightly unequal length and are somewhat ribbon-shaped with a 

 tapering end. They are usually inserted terminally but are lateral in a few forms. A few 

 species are palmelloid and at least one monotypic genus {Tetragonidium) is coccoid in 

 organization. The majority of the pigmented forms are provided with two parietal 

 plastids of a brown, red, blue, green or bluegreen color. In rare and somewhat doubtful 

 instances (cf. Pringsheim, 1944, p. 148) the cells appear to contain several discoid plastids. 

 Pyrenoids and an eye-spot may or may not be present. The colorless forms are sapro- 

 phytic or holozoic. In the motile genera and in the zoospores of the immobile forms there 

 is a superficial curved furrow which extends backward from the place of insertion of the 

 flagella. In many genera a "gullet" extends into the protoplast from the point of insertion 

 of the flagella. The "gullet" may or may not be lined on the side adjacent to the protoplast 

 with trichocysts, or (in the Cryptochrysidaceae) the trichocysts may be situated in the 



