148 ^ CENTURY OF PROGRESS IN THE NATURAL SCIENCES 



orth. mut. Engler (1898, p. 7) ; Euochromonadaceae Pascher (1910, p. 

 47); Physomonadaceae G. M. Smith (1933, p. 182, cf. Korshikov, 1929, 

 pp. 253-261) 

 Family Dinobryaceae Ehrenberg orth. mut. Engler (1897, p. 570) 

 Syn.: Lepochromonadaceae (Pascher) Fritsch (1935, p. 555) 



Order PRYMNESIALES (Fritsch) Papenfuss, stat. nov. 

 Syn.: Series Prymnesieae Fritsch (1935, p. 512) 



Family Prymnesiaceae Conrad (1926, pp. 219-221, as Prymnesiac^es) 



Syn.: Chrysochromulinidae Lackey (1939, p. 138) 

 Family Platychrysidaceae Carter (1937, p. 47) 



Order RHIZOCHRYSIDALES* Pascher (1925b, pp. 497, 561) 

 Syn.: Myxochrysidales Pascher (1931, p. 323) 



Family Rhizochrysidaceae (Pascher) Doflein orth. mut. G. M. Smith 

 (1933, p. 183) 



Syn.: Chrysarachniaceae Pascher (1931, p. 323) 

 Family Chrysothecaceae Pascher (1931, p. 323; cf. Huber-Pestalozzi, 

 1941, p. 241) 



Family Stylococcaceae Huber-Pestalozzl (1941, p. 242) 

 Family Lagynionaceae Fritsch ex Huber-Pestalozzi (1941, p. 242) 

 Family Myxochrysidaceae Pascher ex Huber-Pestalozzi (1941, p. 242) 

 Order CHRYSOCAPSALES Pascher (1912a, p. 175) 

 Syn.: Hydrurales Pascher (1931, p. 323) 



Family Chrysocapsaceae Pascher (1912a, p. 175) 

 Family Naegeliellaceae Pascher (1925b, pp. 559, 561) 



Family Hydruraceae (Rostafinski) Hansgirg orth. mut. De Toni (1895, 

 p. 596) 



Family Celloniellaceae Pascher (1931, p. 323) 

 Family Ruttneraceae Geitler (1943, p. 108) 

 Order CHRYSOSPHAERALES Pascher (1914, p. 143) 



Syn.: Silicococcales Schiller (1925b, p. 67); Pterospermales Schiller (1925b, p. 

 72) nomen nudum; Ochrosphaerales Schwarz (1932, p. 459) 

 Family Chrysosphaeraceae Pascher (1914, p. 159) 



Syn.: Aurosphaeraceae Schiller (1925b, p. 67) 

 Family Chrysostomataceae Chodat (1921, p. 83, as Chrysostomatac^es) 

 This provisional family is probably based, according to Pascher (1925b, 

 pp. 546-548) and Scherffel (1927, pp. 355-356), on the cysts of members 

 of the Chrysomonadales. 

 Family Pterospermaceae Lohmann (1904, p. 39, as Pterospermaceen) 

 See the remarks of Schiller (1925b, p. 72) and Fritsch (1935, p. 550) 

 regarding the status of this group. 

 Family Chrysopediaceae Pascher (1931, p. 323) 

 Family Stichogloeaceae Wille ex Huber-Pestalozzi (1941, p. 263) 

 Order CHRYSOTRICHALES Pascher (1914, p. 143) 



Syn.: Cryptotrichales Pascher (1914, p. 150); Chrysothallales Huber-Pestalozzi 

 (1941, p. 14) 



Family Chrysotrichaceae Pascher (1914, p. 143) 



Syn.: Nematochrysidaceae Pascher (1925b, p. 498) 

 Family Phaeothamniaceae (Lagerheim) Hansgirg orth. mut. De Toni 

 (1888, p. 448) 



Family Thallochrysidaceae Conrad, in Pascher (1914, p. 143) 

 Syn.: Chrysothallaceae Huber-Pestalozzi (1941, p. 14) 

 Subclass siLicoFLAGELLATOPHYCiDAE (Borgert) Papenfuss, stat. nov. 

 Syn.: Order Silicoflagellatae Borgert (1891, p. 661) 



4. As various authors (Pascher, 1913a; G. M. Smith, 1920; Doflein, 1928, p. 461; 

 Huber-Pestalozzi, 1941, p. 241) have remarked, this is an artificial order since the major- 

 ity, if not all, the forms placed here may have been derived from or represent the non- 

 flagellated stages of various flagellated members of the class. 



