i6 Minnesota Algae 



(Collins). Pennsylvania. <Wolle). Hawaii. Volcano Mauna Kea, 

 Island of Hawaii. (Berggren). 



28. Gloeocapsa fenestralis Kuetzing. Phyc. Gen. 173. 1843. De Toni. Syll. 



Algar. 5:53. 1907. 

 Snow. The Plankton Algae of Lake Erie. U. S. Fish Comm. Bull, for 

 1902. 22: 392. 1903. 



Plate I. fig. IS. 



Plant mass thin, mucous, expanded, irregular, green; plants 7-15 mic. 

 in diameter, spherical or oblong, associated in families 16-48 mic. in diam- 

 eter; sheaths very thick, colorless, more or less distinctly lamellose, often 

 quickly peeling off; cells 2.2-3.4 mic. in diameter; cell contents homogeneous 

 or granular, pale blue-green. 



Ohio. Put-in-Bay, Lake Erie. (Snow). 



29. Gloeocapsa arenaria (Hassall) Rabenhorst. PI. £ur. Algar. 2: 39. 1865. 



De Toni. Syll. Algar. 5: 54, 1907. 

 West. The Freshwater Algae of Maine. Journ. of Bot. 27:207. 1889. 

 Bessey. Miscellaneous Additions to the Flora of the State. Bot. Surv. Nebras- 

 ka. 2:46. 1893. Saunders. Protophyta-Phycophyta. Flora of Nebraska. 

 16. pi. I. f. 3. 1894. Buchanan. Notes on the Algae of Iowa. Proc. Iowa 

 Acad. Sci. 14:9. 1909. 



Plate I. fig. 16. 



Plant mass mucous, adherent, olivaceous; plants 6-17 mic. in diameter, 

 spherical, associated in families up to 43 mic. in diameter; sheaths oblong 

 or somewhat spherical, thick, colorless, lamellose, soon peeling off; cells 

 3.7-6 mic. in diameter; cell contents distinctly granular, blue-green or green, 

 becoming darker. 



Maine. (West). Minnesota. Near Minneapolis. (Lilley). Iowa. 

 Abundant on flower pots in greenhouse. Ames. 1904. (Buchanan). Forming 

 thin blue-green coating on damp stones. Grinnell. 1905. (Fink). Nebras- 

 " ka. On flower pots in greenhouse. Lincoln. (Saunders). 



30. Gloeocapsa montana Kuetzing. Phyc. Gen. 173. no. i. 1843. De Toni. 



Syll. Algar. 5: 51. 1907. 



Tilden. American Algae. Cent. II. no. 197. 1896. (Gl. montana cal- 

 darii Sur.). 



Plate I. fig. 17. 



Plant mass amorphous, somewhat thick, mucous, pale yellow, becoming 

 greenish; plants 19-39 niic. in diameter, spherical or somewhat spherical, 

 usually solitary; sheaths lamellose, colorless, sometimes peeling off; cells 

 3-6 mic. in diameter; cell contents somewhat opaque, homogeneous, or 

 slightly granular, pale blue-green. 



Wyoming. In warm overflow water. Lower Geyser Basin, Yellow- 

 stone National Park. June 1896. (Tilden). 



