112 UNIVERSITY OF COLORADO STUDIES 



S. hassallii (Jenner) Petit. [Collins, Green Alg. of N.A., p. 117.] 



Teller Lake, July 4, 1908, Dodds (55); Teller Lake, July 4, 1908, Dodds (D242); 

 Hummock Pool, July 18, 1908, Dodds (D265); Duck Lake, July 18, 1908, Dodds (D271); 

 pool near Corona Lake, August 28, 1908, Ramaley (n); pool near Corona Lake, August 

 28, 1908, Dodds (D353); Smartweed Lake, June 15, 1910, Robbins (47). 

 S. longata (Vaucher) Kuetzing. [Collins, Green Alg. of N.A., p. 107.] 



Hot Sulphur Springs, August, 1907, Ramaley (33); Hiram Prince Lake, July 11, 

 1908, Dodds (D252); Redrock Lake, August 18, 1908, Ramaley (1); Manchester Lake, 

 August 29, 1908, Ramaley (5); Redrock Lake, September 7, 1908, Ramaley (32). This 

 species is reported from Colorado by Collins. 

 S. maxima (Hassall) Wittrock. [Collins, Green Alg. of N.A., p. :i2,| 



Smartweed Lake, August 29, 1909, Ramaley (27); Park Lake, near Tolland, July 4, 

 191 1, Brannaman (65); Boulder, in water tank one-half mile east of University of 

 Colorado Campus, October 26, 1910, Robbins. 

 S. mirabilis (Hassall) Kuetzing. [Collins, Green Alg. of N.A., p. 113.] 



East Lake, near Tolland, June 13, 1909, Ramaley (30), determined by Collins. 

 S. nitida (Dillwyn) Link. [Collins, Green Alg. of N.A., p. no.] 



Wet Mountain Valley, Westcliff, 1889, Cockerell. 

 S. porticalis (Miiller) Cleve. [Collins, Green Alg. of N.A., p. 108.] 



Wet Mountain Valley, near Short Creek, West Cliff, 1889, Cockerell; Hot Sulphur 

 Springs, August, 1907, Ramaley (33); lake near Pine Glade school, August 22, 1907, 

 Ramaley (34); Hiram Prince Lake, September 15, 1907, Ramaley (35); Frank Prince 

 Lake, July n, 1908, Dodds (D250); Eldora Lake, May 31, 1910, Robbins (49); Boulder 

 Creek, near Boulder, January 29, 1910, Robbins (62). 

 S. ternata Ripart. [Collins, Green Alg. of N.A., p. 144.] 



Boulder, May 3, 1909, Robbins (37). Reported from Colorado by Collins. 

 S. weberi Kuetzing. [Collins, Green Alg. of N.A., p. 116.] 



East Lake, near Tolland, June 13, 1909, Ramaley (19); Smartweed Lake, August 29, 

 1908, Dodds (D363). Abundant in Park Lake, near Tolland, during the summer months, 

 forming large floating masses near the shore line. 



Family MESOCARPACEAE 

 Mougeotia laetevirens (A. Braun) Wittrock. [Collins, Green Alg. of N.A., p. 125.] 



Eldora Lake, forming large floating masses on the surface, May 31, 1910, Robbins 

 (17); Park Lake, near Tolland, July n, 1911, Robbins. This species is very abundant 

 in lakes and ponds at middle elevations. 

 M. scalaris Hassall. [Collins, Green Alg. of N.A., p. 123.] 



Wet Mountain Valley, near Ula, 1889, Cockerell. 



Order VOLVOCALES 

 Family CHLAMYDOMONADACEAE 

 Chlamydomonas sp. [Collins, Green Alg. of N.A., p. 128.] 



University Lake, Boulder, so abundant in the lake at this date as to give a green color 

 to the water, March 7, 1910, Robbins (4). 



