May, 1917] The Algce of Michigan 229 



Cladophora callicoma Kiitz. Little Traverse Bay, Aug. 21, 

 1916. (Hankinson). 



Cladophora glomerata (L.) Kiitz. Manistee River, Manistee, 

 Aug. 29, 1910. (Hankinson); Swift stream, Caloma 

 Junction, June 4, 1915. 



Cladophora fracta (Dillw.) Kiitz. Estuary, New Buffalo, 



May 31, 1915; lake, Holland, June 1, 1915. 

 Pithophora varia Wille. Alma, Gratiot Co., Oct., 1905. 



ULOTRICHACE.E. 



Ulothrix zonata (Web. & Mohr) Kiitz. Isle Royale, July 30, 

 1910 (Cooper); White Fish Point, Aug. 1913 (Hankinson). 

 On rocky shores along all the Great Lakes. 



Ulothrix tenuissima Kiitz. Trout Lake, Aug. 10, 1915. Pre- 

 viously reported from New York and Alaska. 



Geminella interrupta Turp. Railroad ditches, New Buffalo, 

 May 31, 1915. New to America. 



Radiofilum irregulare (Wille) Brunthaler. Carp Lake, Emmet 

 Co., Aug. 9, 1915. Not previously reported from America. 



Radiofilum fiavescens G. S. West. Twin Lake, June 2, 1915. 

 Not previously reported from America. 



HERPOSTEIRACE.E. 



Herposteiron confervicola NageH. New Buffalo, May 31, 1915; 

 lake, Bangor, June 4, 1915; ditch, Mackinaw City, Aug. 9, 

 1915; bog pool, Manistique, Aug. 11, 1915. 



CHAETOPHOR.A.CE^. 



Chaetophora elegans (Roth) Ag. New Buffalo, May 31, 1915; 

 Saugetuck, June 1, 1915; railroad ditch, Breedsville, June 

 4, 1915; Trout Lake, Chippewa Co., Aug. 10, 1915; bog 

 pools. Manistique, Aug. 11, 1915. 



Chaetophora incrassata Hazen. Indian River, Manistique, 

 Aug. 11, 1915; Vermillion Lake, Chippewa Co., Aug. 1, 

 1913 (Hankinson) ; Trout Lake, Aug. 10, 1915; slow stream, 

 Douglas Lake, July 3, 1914 (Ruthven) ; Carp Lake, Aug. 9, 

 1915; New Buffalo, May 31, 1915; bog stream, Saugetuck, 

 June 1, 1915. All the specimens are small when compared 

 with the specimens from Illinois. 



Stigeoclonium amoenum Kiitz. Ditch near Douglas Lake, 

 July 3, 1914 (Ruthven); Saugetuck, June 1, 1915. 



