86 ILLINOIS ACADEMY OF SCIENCE 



Oedogonium taphrosporum Nordstedt and Hirn. 



Collected in the pond on the Normal School campus, 

 July, 1912. Previously reported from Massachusetts. 

 Oedogonium tentoriale Nordstedt and Hirn. 



Collected from the Tile Factory ponds, October, 1910. 

 The dimensions approach the lower limits given by 

 Hirn. Not known aside from the original station in 

 Brazil. 

 Oedogonium Vaucherii (Le CI.) A. Braun. 



Common in summer and early autumn in ponds at 

 Charleston and Ashmore. Reported from Massachu- 

 setts. Fide Collins. 

 Oedogonium Wolleanum Wittrock. 



Common as scattered filaments among other algae dur- 

 ing April and May in ponds. Widely distributed in 

 the United States. Fide Collins. 

 Bulbochaete Brebissonii Kuetzing. 



Abundant in west Big Four pond during May, 1911. 

 Known from Massachusetts and Alaska. 

 Bulbochaete crassiuscula Nordstedt. 



Common in pond southeast of Lerna during ]\Iay, 1912. 

 Previously known from Greenland and Massachusetts 

 Bulbochaete intermedia De Bary. 



Collected during May, 1912, from Ice pond, Ashmore, 

 and the Tile Factory pond, Arthur. Widely distributed 

 in America. 

 Bulbochaete minor (A. Braun) Wittrock. 



Collected from a pool in a swampy ravine bottom south- 

 east of Decker, Indiana, May, 1911. Has been report- 

 ed from New Jersey. 

 Bulbochaete rectangularis Wittrock. 



Apparantly common in ponds during May. Reported 

 from Pennsylvania and New England. 

 Bulbochaete varians Wittrock. 



Collected from the pond on the campus, Charleston, and 

 the pond southeast of Lerna, May, 1912. Not prev- 

 iouslv reported from America. 

 Bulbochaete varians subsimplex (Wittrock) Hirn. 



Collected from the campus pond during October, 1911. 

 Reported from Pennsylvania. 



Chaetophoraceae 



Microthamnion Kuetzingianum Naegeli. 



Common in small streams during autumn and spring. 

 Microthamnion exiguum Reinsch. 



A minute species with cells 1-2 microns in diameter. 

 Collected at Marshall pond, Charleston, April, 1911. 



