Lagtjnion Scherffelii Pascher 1912, p. 155 

 PL 97, Fig. 14 



Lorica depressed-ovate or subpyramidate, flattened against the 

 substrate, extending into a short neck with diverging sides; proto- 

 plast with 2 chromatophores. 



On filamentous algae in habitats rich in organic matter; in shallow 

 water in bogs and backwashes from several lakes. Mich., Wis. 



Lagynion triangularis var. pyramidatum Prescott 1944, p. 364 



PI. 97, Fig. 11 

 Lorica narrowly pyramidate with uneven margins, or subtriangu- 

 lar, tapering from the base to a short or long neck with nearly 

 parallel margins, 10.8-12/a wide, 15-20/a high. 



This variety differs from the typical in being narrower, propor- 

 tionately taller and in having a longer neck. 

 On filamentous algae. Wis. 



ORDER CHRYSOCAPSALES 



In this order are included colony-forming, palmelloid organisms. 

 The globose cells are embedded in copious mucilage, forming 

 amorphous masses or thalli of rather definite shape. There are 1 or 

 2 golden-brown chromatophores. Although non-motile under ordi- 

 nary conditions these cells may assume a swimming zoospore ex- 

 pression directly, and after scattering initiate the formation of new 

 colonial masses. In the zoospore state the cells have 1 or 2 flagella. 

 Vegetative reproduction by ordinary cell division may be carried 

 on throughout the colony or it may be confined to the distal end. 

 Fragmentation may also be employed by some members. Two fam- 

 ilies are represented in the known flora of the United States, but 

 only 1 has members in our collections. 



FAMILY CHRYSOCAPSACEAE 



Characters as described for the order. The cells are embedded in 

 copious mucilage where they multiply by cell division in all planes 

 throughout the colony. 



CHRYSOCAPSA Pascher 1913, p. 85 



A free-floating colony of spherical, or ellipsoidal cells inclosed in 

 a wide, colorless, gelatinous envelope which is usually homogeneous 

 but may show lamellations; chromatophores one or more golden- 

 brown parietal plates; pigment-spot sometimes present. 



[384] 



