66 
IOWA ACADEMY OF SCIENCE 
67. C. soluta. Pringsh. 
68. C. scutata Breb. 
Fayette. Fink. 
Fayette. Fink. 
69. C. orbicularis. Pringsh. 
Ames. In aquarium. Buchanan. 
Family II. 
Herposteiraceae. 
No species of this family have been reported from the state, although 
Herposteiron will probably be found. 
Family III. 
Ulotrichaceae. 
KEY TO THE GENERA. 
Filaments threadlike, cells cylindrical with truncate apices. 
Component cells longer than broad I. Ulothrix 
Component cells in part broader than long 2. Schizomeris 
Filaments fragile, cells with rounded apices, cells cylindric, resembling a frag- 
mented Ulothrix 3. Stichococcus 
1. Ulothrix. 
70. U. tenerrima Kutz. 
Abundant in many places, slow running water or*stagnant pools. 
Iowa City. Hobby. 
Ames. Buchanan. 
Eagle Grove. Buchanan. 
2. Schizomeris. 
71. S. leillinii Kutz. 
Iowa City. Hobby. 
3. Stichococcus. 
72. S. bacillaris Nag. 
Ames, Iowa. Spring on College farm. Buchanan. 
* 
Family IV. 
Cylindrocapsaceae. 
1. Cylindrocapsa. 
73. C. confer ta West. 
A species has been found at Ames which agrees exactly with West’s figures. 
Ames. Pond, amid Gloeotricha. Buchanan. 
Family V. 
Chaetophoraceae. 
KEY TO THE GENERA. 
Filaments fine, showing little difference in character of the stem and 
branches 1- Myxonema 
