28 Minnesota Algae 



3 Plant mass amorphous, gelatinous, dirty green or olive 



A. virescens 



III Plant mass brown. 



Cells 4.S-S-S mic. in diameter A. brunnea 



64. Aphanocapsa elachista W. and G. S. West. On some Freshwater 



Algae from the West Indies. Journ. Linn. Soc. Bot. 30: 276. pi. 15. 

 f. 9, 10. 1895. De Toni. Syll. Algar. 5: 73. 1907. 



Plate 11. fig. 6. 



Colonies 26-38 mic. in diameter, not forming a distinct plant mass, 

 very small, somewhat globose; sheaths firm, gelatinous, colorless, not 1am- 

 ellose, soon diffluent; cells 1.5-2 mic. in diameter, spherical, single or in 

 pairs, loosely arranged; cell contents homogeneous, blue-green. 



West Indies. On trees. Summit of Trois Pitons (4500 feet elevation). 

 November and December 1892; in stream, Grande Soufriere, Dominica. 

 (Elliott). 



"This species seems characteristically distinct by reason of its minute 

 cells in the very small, globose colonies, which were scattered amongst 

 other algae." — West. 



65. Aphanocapsa zanardinii (Hauck) Hansgirg. De Toni. Syll. Algar. 



5: 67. 1907. 



Plant mass colorless; cells 10-16 mic. in diameter, globose, single or in 

 families of two or four; individual sheaths very thin, hyaline, scarcely vis- 

 ible; cell contents homogeneous, sometimes granular, emerald green. 



Massachusetts. (Collins). 



66. Aphanocapsa grevillei (Hassall) Rabenhorst. Fl. Eur. Algar. 2:50. 



1865. De Toni. Syll. Algar. 5: 73. 1907. 

 Wolle. Fresh-Water Algae. U. S. 333. pi. 210. f. 38, 39. 1887. Ben- 

 nett. Plants of Rhode Island. 115. 1888. Buchanan. Notes on the Algae 

 of Iowa. Proc. Iowa Acad. Sci. 14: 9. 1908. 



Plate II. fig. 7. 



Plant mass gelatinous, globose, densely aggregated, more or less con- 

 fluent, dirty green, when dry becoming olive or brownish; sheaths soon 

 diffluent; cells 3.2-5.6 mic. in diameter, spherical or elliptical, rather crowd- 

 ed, single or in pairs; cell contents finely granular, blue-green. 



Greenland. (Boergesen). Pennsylvania. Submerged stones in shal- 

 low pond water. (Wolle). Rhode Island. Benedict and other ponds. 

 (Bennett). Iowa. Pond near R. R. Ames. 1905. (Buchanan). 



67. Aphanocapsa rivularis (Carmichael) Rabenhorst. Fl. Eur. Algar. 2: 



49. 1865. De Toni. Syll. Algar. 5: 69. 1907. 

 Wolle. Fresh Water Algae. II. Bull. Torn Bot. Club. 6: 137. 1877. 



Plate II. fig. 8, 9. 



Plant mass hemispherical, gelatinous, tuberculose, often confluent, blu- 



