Myxophyceae ^j 



Plate II. fig. 5. 



Colonies 19 mic. in diameter, 32.5 mic. in length, oval or elliptical; cells 

 2.5-2.7 mic. in diameter, 4.8-5.7 mic. in length, somewhat crescent shaped, 

 with acute apices, associated in families of two or four; cell contents homo- 

 geneous, blue-green. 



West Indies. On damp wall of dam. Sharp's River. St. Vincent. May 

 1892. (Elliott). 



62. Gloeothece magna Wolle. Fresh Water Algae. II. Bull. Torr. Bot. 



Club. 6: 138. 1877. De Toni. Syll. Algar. 5: 62. 1907. 



Plant mass large, thin, irregularly oblong, pale yellowish green: colony 

 containing many plants; sheaths usually colorless at the margins; cells 3-4 

 mic. in diameter, nearly twice as long as wide. 



Pennsylvania. Forming a coating on small water plants, or floating in 

 ponds, many families joined together. Near Bethlehem. (Wolle). 



63. Gloeothece fuscolutea Naegeli. Gatt. Einz. Alg. 58. 1849. De Toni. 



Syll. Algar. 5: 66. 1907. 



Tilden. Collection of Algae from the Hawaiian Islands. Haw. Alma- 

 nac and Annual for 1902. 113. 1901. American Algae. Cent. V. no. 500. 1901; 

 Algae Collecting in the Hawaiian Islands. Postelsia: The Year Book of 

 the Minnesota Seaside Station, i: 147. 1902. 



Plant mass soft, gelatinous, blue-green; sheaths thick, lamellose, color- 

 less, brownish or yellowish; cells 4-5.5 mic. wide, 6-11 mic. long, oblong- 

 cylindrical, single or associated in families of four or eight; cell contents 

 blue-green. 



Hawaii. Covering surface of water in plat in rice field. Aiea. Oahu. 

 June 1900. (Tilden). 



Genus APHANACAPSA Naeg. Gatt. Einz. Alg. 52. 1849. 



Plant mass more or less expanded, colorless or blue-green, yellow or 

 brown; plants spherical or angular from mutual pressure, single or in pairs; 

 individual sheaths thick, very soft, colorless, not distinct, confluent into a 

 mucous, amorphous, homogeneous colonial tegument; tegument colorless 

 or tinted brown or blue-green; reproduction by successive division of the 

 cells alternately in three directions. 



I Plant mass colorless. 



1 Cells 1.5-2 mic. in diameter A. elachista 



2 Cells 10-16 mic. in diameter A. zanardinii 



II Plant mass green or blue-green. 



1 Plant mass globose, gelatinous, dirty green; cells 3.2-5.6 mic. in diam- 



eter A. grevUlei 



2 Plant mass hemispherical, gelatinous, blue-green-; cells 5-6 mic. in 



diameter A. rivularis 



