chromatophores 1 or 2-(3) when young, becoming numerous in 

 age; cytoplasm containing oil globules; reproduction by aplanospores 

 or heterokont biflagellate zoospores. 



Botrydiopsis arhiza Borzi 1895, p. 170 

 PI. 95, Figs. 27, 28 



Cells solitary, or in clusters without a gelatinous investment as a 

 result of autospore liberation from mother cell; globose or spheroi- 

 dal, the walls smooth; chromatophores usually 2-4 parietal plates; 

 oil bodies small and numerous; cells 8-10/x in diameter (on damp 

 soil as much as 70/x in diameter ) . 



This species is more often found on moist soil than in strictly 

 aquatic habitats. 



In mixtures of algae in Sphagnum bogs. Mich., Wis. 



CHLORALLANTHUS Pascher 1930, p. 421 

 Cells solitary, oblong or broadly ellipsoid, with parallel or sub- 

 parallel lateral margins and broadly rounded poles (rarely with 

 slightly attenuated poles); cell wall sculptured, sometimes faintly 

 so, with circular or 4-6-sided depressions arranged in transverse 

 or rectilinear series, the thickenings between the depressions often 

 bearing spines; wall divided in 2 equal sections which adjoin in a 

 transverse plane, silicified; chromatophores numerous parietal plates 

 when old (2 in the young cells); reproduction by 2-4 (or as many 

 as 16) zoospores, or by 2-4 autospores in each cell. 



Chlorallanthus oblongus Pascher 1930, p. 422 

 PI. 95, Fig. 4 

 Cells broadly ellipsoid or oblong, with rounded poles, margins 

 subparallel, the wall brown, sculptured with reticular thickenings 

 and intervening depressions resulting in teeth-like projections at 

 the wall margin; chromatophores numerous ovate discs or broad 

 parietal plates; cells 5-9 fi in diameter, 10-15/x long. 

 In shallow water of small acid bog lakes. Mich. 



CHLOROCLOSTER Pascher 1925, p. 52 

 Cells sohtary or in small famiHes (not inclosed in evident mucilage), 

 elongate-fusiform or club-shaped, straight or more often twisted 

 and sickle-shaped, the poles often dissimilar, one bluntly rounded, 

 the other tapering to a point, the wall smooth; chromatophores 2 to 

 many, either parietal folded plates or (more rarely) ovate discs, 

 with pyrenoids sometimes present; reproduction by autospores and 

 cyst-like aplanospores. 



[350] 



