28 MINNESOTA BOTANICAL STUDIES. 



32. Characium heteromorphuni Reinsch. Contrib. 80. 



1874. 

 Fish hatcheries, St. Paul. Oct. 1, 1893. 



ZTGNEMACEAE (Menegh.) Rab. F1. Eur. Alg. 3 : 228. 1868. 



33. Spirogyra weberi Kg. Phyc. gener. 279. 1843. 



Pool near lake Kilpatrick, July 5, 1893. 



34. Spirogyra longata (Vauch.) Kg. Spec. Alg. 439. 1849 



Marsh near Stony brook. July 11, 1893, 



35. Spirogyra gracilis (Hass. ) Kg. Spec. Alg. 438. 1849. 



Marsh near Stony brook. July 11, 1893. 



36. Spirogyra varians (Hass.) Kg. Spec. Alg. 439. 1849. 



Lake Kilpatrick. July 15, 1893. 



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



Gull lake. July 17, 1893. 



38. Spirogyra Tieglecta (Hass.) Kg. Spec. Alg. 441. 1849. 



Home brook, July 22, 1893. 



39. Spirogyra majuscula Kg. Spec. Alg. 441. 1849. 



Minneapolis. Sept. 5, 1893. 



40. Zygnema leiospermum De By. Rabenh. Alg. Exs. n. 



638. 1850-67. 

 Lake Sibley. July 22, 1893. 



4L Zygnema cruciatum (Vauch.) Ag. Syst. Alg. 77, n. 5. 



1824. 

 Pool near lake Kilpatrick. July 10, 1893. 



42. Zygnema aequale (Kg.) De Toni. Syl. Alg. 1 : 739. 1889. 



Pool south of lake Kilpatrick. July 5, 1893. 



43. Mougeotia genuflexa (Dillw.) Ag. Syst. Alg. 83. 1824. 



Pool near lake Kilpatrick. June 16, 1893. 



DESMIDIACEAE (Kg.) De By. Conjug. 1858. 



44. Desmidium baileyi (Ralfs.) De. By. Conjug. 70. 1858, 



Marsh near Monroe. July 12, 1893. 



45. Spirotaenia condensata Breb. Ralfs. Brit. Desm. 179. 



1848. 

 Pool near lake Kilpatrick. June 24, 1893. 



46. Peniiim interruptum Breb. Ralfs. Brit. Desm. 151. 



1848. 

 Pool near lake Kilpatrick. July 5, 1893. 



