220 The Ohio Journal of Science [Vol. XVII, No. 7, 



SCYTONEMACE.^. 



Scytonema ocellatum (Dillwyn) Thuret. Walnut Lake, May 19 



190t). (Hankinson). 

 Tolypothrix tenuis Kiitz. Twin Lake, June 2, 1915; Lake 



Rowland, Houghton Co., 1905. (Hankinson); Caloma 



Junction, June 4, 1915. 

 Tolypothrix lanata (Desvaux) Wartmann. Bog near Carp 



Lake, Emmet Co., Aug. 9, 1915. 

 Tolypothrix limbata Thuret. Pasture pools, Caloma Junction, 



June 4, 1915; railroad ditch, Mackinaw, Aug. 9, 1915. 



STIGONEMACE.-E. 



Stigonema informe Kiitz. Railroad pools, Mackinaw, Aug. 9, 

 1915. 



RIVULARIACE.E. 



Rivularia compacta ColHns. Whitefish Point, Aug., 1913, 



(Hankinson). Previously reported from Massachusetts 



and Connecticut. 

 Rivularia natans (Hedwig) Welwitsch. Carp Lake, Aug. 9, 



1915; Trout Lake, Aug. 10, 1915. 

 Rivularia pisum Ag. Trout Lake, Aug. 10, 1915; Breedsville, 



June 4, 1915; Carp Lake, Aug. 9, 1915; Walnut Lake, 1906. 



(Hankinson). 



CHLOROPHYCE^ HETEROKONT^. 



TRIBONEMACE.^. 



Chlorobotrys regularis (West) Bohlin. Railroad pool, Macki- 

 naw, Aug. 9, 1915. 



Ophiocytium cochleare (Eichwald) A. Br. Railroad ditch, 

 Breedsville, June 2, 1915; Carp Lake, Aug. 9, 1915; stagnant 

 pool, Seney, Aug. 12, 1915. 



Conferva minor Klebs. Railroad ditch, Breedsville, June 2, 1915. 



Conferva bombycina Ag. Railroad ditch. New Buffalo, May 

 31, 1915; Seney, Aug. 12, 1915; Spring, Manistique, 

 Aug. 11, 1915; Saugetuck, June 1, 1915; Isle Royale, 1911, 

 (Cooper). 



Conferva bombycina forma tenuis (Hazen) Collins. Railroad 

 ditch, Breedsville, June 2, 1915. 



Conferva utriculosa Kiitz. Railroad pool. New Buffalo, May 

 31, 1915; Seney, Aug. 12, 1915; Spring, Manistique, 

 Aug. 11, 1915; Saugetuck, June 1, 1915; Orchard Lake, 

 Aug. 15, 1915. 



