234 MINNESOTA BOTANICAL STUDIES. 



151. Spirogyra deeimina (Muell.) Kg. Phyc. Germ. 223. 



1845. 

 Purgatory creek, Eden Prairie, Hennepin county. 

 July 11, 1894. 



152. Spirogyra rivularis Rabenh. F1. Eur. Algar. 3 : 243. 



1868. 

 Purgatory creek, Eden Prairie, Hennepin county. 

 July 13, 1894. 



153. Spirogyra rirularis Rabenh. var. minor Hansg. 



Prodr. 161. 1886-88. 

 Stone quarry, Minneapolis. October 9, 1894. 



154. Spirogyra setiforinis (Roth) Kg. Spec. Alg. 442. 1849. 



Minneapolis. July 5, 1894. 



155. Spirogyra erassa Kg. Alg. Etsicc. n. 98. 1833-36. 



Near Purgatory creek, Eden Prairie, Hennepin county. 

 July 14, 1894. 



156. Spirogyra mirabilis (Hass ) Kg. Spec. Alg. 438. 1849. 



Shadow falls, St. Paul. August 3, 1894. 



157. Spirogyra bellis (Hass.) Crouan. F1. Finist.121. 1867. 



Eden Prairie, Hennepin county. July 14, 1894. 



158. Spirogyra subsalsa Kg. Phyc. Germ. 222. 1845. 



Purgatory creek, Eden Prairie, Hennepin county. 

 July 13. 1894. 



159. Spirogyra qiiadrata (Hass.) Petit in Bull. Soc. Botan. 



Fr.*21:41. 1874. 

 Minneapolis. October 11, 1894. 



160. Spirogyra grevilleaiia (Hass.) Kg. Spec. Alg. 438. 



1849. 

 Minneapolis. Apr. 30, 1894. 



DESMIDIACE.\E (Kg.) DeBy. Conjug. 1858. 



161. Closterhini acerosum (Schrank) Ehr. Abh. Berl. 



Akad. 1831. 

 Minneapolis, Sept. 13, 1894. Coll. W. D. Frost. 



162. CosQiariuni siibcreuatum Hantzsch. in Rabenh. Alg. 



n. 1213. 1850-67. 

 Osceola, Wisconsin. September 24, 1894. 



HORMOGONEAE Thuret. Essai de class, des Nostochin^es. 

 Ann. des Sc. Nat. Bot. vi. 1 : 375. 1875. 



