30 MINNESOTA BOTANICAL STUDIES. 



62. Micrasterias truncata (Corda) Breb. Ralfs. Brit. 



Desm. 75. n. 9. 1848. 

 Peat-bog near lake Kilpatrick. June 27, 1893. 



63. Staurastriim odoutatum Wolle. Desm. U. S. 134. 1884. 



Peat-bog near lake Kilpatrick. June 19, 1893. 



64. Staurastriim tohopecaligense Wolle. Preshw. Alg. 



U. S. 45. 1887. 

 Peat-bog near lake Kilpatrick. June 26, 1893. 



65. Staurastrum dejectum Breb. var. convergens Wolle. 



Desm. U. S. 121. 1884. 

 Lake Kilpatrick. July 3, 1893. 



66. Staurastrum ravenelii Wood. Freshw. Alg. U. S. 153. 



1872. 

 Marsh north of Stony brook. July 11, 1893. 



67. Staurastrum furcatum (Ehrenb.) Breb. Liste. Desm. 



136. 1856. 

 Peat bog near lake Kilpatrick. July 14, 1893. 



68. Staurastrum liirsutum (Ehrenb.) Breb. Ralfs. Brit. 



Desm. 127. 1848. 

 Peat-bog near lake Kilpatrick. July 19, 1893. 



69. Staurastrum tricornutum Wolle. Desm. U. S. 145. 



1884. 

 Home brook. July 22, 1893. 



NOSTOCEAE (Menegh.) Thuret. Am. Sci. Nat. Bot. III. 

 2:319. 1844. 



70. Mastigonema elougatum Wood. Prodr. Proc. Amer. 



Phil. Soc. 128. 1869. 

 Pool near lake Kilpatrick. June 20, 1893. 



71. Mastigonema aerugineum (Kg.) Kirch. 



Pool near lake Kilpatrick. June 20, 1893. 



72. Mastigonema sejunctum Wood. Freshw. Alg. U. S. 53. 



1872. 

 Lake Harriet, Minneapolis. Sept. 19, 1893. Coll. C. 

 A. Ballard. 



73. Scytonemaintertextum (Kg. ) Rab. 



Peat-bog near lake Kilpatrick. July 13, 1893. 



74. Hapalosiphon fuscescens Kg. 



Lake Kilpatrick. June 21, 1893. 



