Glaucocystis oocystiformis Prescott 1944, p. 372 

 PI. 108, Fig. 3 



Cells solitary (or in colonies ?), broadly elliptic, with nodular 

 thickenings of the cell wall at the poles; chromatophores numerous, 

 irregular pads at the periphery of the cell about a central, spherical, 

 colorless vacuole (?); cells 20-27.3/^ in diameter, 40-45ju long. 



This species differs from the others in the shape of cell, the form 

 of the chromatophores, and in its possession of polar nodules. 

 Whether the absence of colonial association or the retention of 

 autospores within the mother cell wall is a constant feature is un- 

 determined, but in all cases observed, the cells were solitary. In 

 the developmental stages of G. Nostochinearum as described by 

 Hieronymus (1892a) the chromatophores show much the same 

 character as exhibited in G. oocystiformis. I have not found examples 

 of the latter species showing any form of chromatophore other than 

 that described. 



In a pooled stream, northern Wisconsin. 



GLOEOCHAETE Lagerheim 1883, p. 39 



Either a single colorless cell or a group of 2-4 such individuals 

 endophytized by ovate, blue-green protoplasts which form a cup- 

 shaped body within the host cell; colorless cell spherical, with a 

 single long and very fine gelatinous hair; plants inclosed in a copious, 

 homogeneous gelatinous envelope, attached to the walls of fila- 

 mentous algae. 



The genus is similar to Glaucocystis in respect to its symbiotic 

 composition. The host cell is regarded as a colorless member of the 

 Tetrasporaceae ( Chlorophy ta ) . As in the genus mentioned above, 

 the colorless host cell is not well understood and merits a critical 

 study. 



Gloeochaete Wittrockiana Lagerheim 1883, p. 39 

 PI. 108, Fig. 9 



Characters as described for the genus; cells 4-8;a in diameter, 

 usually in groups of 4; gelatinous setae about 20 times the diameter 

 of the cell in length; endophytic cells 1 (or 2 ?), ovoid, forming a 

 blue-green cup within the host cell. 



Attached to filamentous algae in soft water lakes. Mich., Wis. 



ORDER CHAMAESIPHONALES 

 FAMILY CHAMAESIPHONACEAE 



Members of this family are solitary, or gregarious and form 

 families attached as epiphytes or develop as encrusting expansions 



[475] 



