several parietal discs; a conspicuous pigment-spot usually visible 

 (sometimes appearing black); cells 10-27/i, in diameter; colony as 

 much as 90/i, in diameter. 



Rare; in several lakes and bogs. Mich., Wis. 



GLOEOBOTRYS Pascher 1930, p. 438 

 A free-floating or sedentary, gelatinous mass of regular or irregular 

 shape, containing many spherical or slightly ovate cells; the sheath 

 not at all or but very weakly stratified; chromatophores 2-4 parietal 

 plates or discs; reproduction by aplanospores or by zoospores. There 

 is but one species in our collections. 



Gloeobotnjs limneticus (G. M. Smith) Pascher 1937-1939, p. 637 



PI. 93, Figs. 35, 36 



An ovate colony of 10-30 ovate cells in clusters within a wide, 

 gelatinous envelope; chromatophores 3-4, yellow-green, parietal 

 discs; cells 5-6/* in diameter, 6-8jli long; colonies up to 200/a in 

 diameter. 



In the tychoplankton of several soft water lakes. Wis. 



FAMILY BOTRYOCHLORIDACEAE 



Cells clustered, few to many, in small families or colonies (rarely 

 2-4 in a cluster ) without being inclosed by a definite colonial sheath 

 of mucilage; cells round, short-cylindric, or needle-shaped, free living 

 or adherent to other algae; the cells in adherent colonies angular 

 from mutual compression; reproduction by autospores and zoospores. 



CHLORELLIDIOPSIS Pascher 1939, p. 683 

 Cells seldom solitary, mostly in closely arranged, sometimes 

 cushion-like aggregates, sessile on substrates in 2's, 3's or 4's, irreg- 

 ularly globose but flattened by mutual compression along the 

 adjoined walls; a mucilaginous investment sometimes evident; wall 

 smooth; chromatophores 1 or 3 thin parietal plates; reddish globules 

 of waste material present in the cytoplasm; reproduction by auto- 

 spores and zoospores. 



Chlorellidiopsis separabilis Pascher 1939, p. 686 

 PI. 95, Figs. 16-18, 23 



Cells globose, subglobose, or pyriform, forming extended, loose 

 patches on filamentous algae and other aquatic plants; cells arranged 

 in 2's or 3's, occasionally solitary; chromatophores 2 parietal plates; 

 cells 8-1 4/x, in diameter. 



In mixtures of algae in Sphagnum bog pools. Mich. 



[356] 



