278 



PROTOZOOLOGY 



S. fluviatilis (Stein) (Fig. 112, h). 14-30/zby 10-20m; fresh water. 



Genus Brachiomonas Bohlin. Lobate; with horn-like processes, 

 all directed posteriorly; contractile vacuoles; ill-defined chromato- 

 phore; pyrenoids; with or without stigma; sexual and asexual re- 

 production; fresh, brackish or salt water. 



Fig. 112. a-c, Chlamydomonas monadina, X470 (Goroschankin) (a, 

 typical organism; b, anisogamy; c, palmella stage); d, C. epiphytica, 

 X1030 (Smith); e, C. globosa, X2000 (Snow); f, C. gracilis, X770 (Snow); 

 g, Haematococcus pluvialis, X500 (Reichenow); h, Sphaerellopsis fluvia- 

 tilis, X490 (Korschikoff); i, Brachiomonas westiana, X960 (West); j, 

 Lobomonas rostrata, X1335 (Hazen); k, Diplostauron pentagonium, X1110 

 (Hazen); 1, Gigantochloris permaxima, X370 (Pascher); m, Gloeomonas 

 ovalis, X330 (Pascher); n, Scourfieldia complanata, X1540 (West); o, 

 Thorakomonas sabulosa, X670 (Korschikoff). 



