156 Til<b a — Notes on a Collection of Algmfrom Guatemala. 



Eudorina elegans. 



Eudorina elegans Ehrenb. in Monatsb. derAkad. d. Wissensch. zu Berlin. 

 78, 152. pi. 2. f. 10. 1831. 



Associated with Microcystis flos-aquse and Anabsena flos-aquse. Lake 

 Amatitlan. Temperature of water 7.'!°. "Very abundant." Collected 

 with a surface net. W. A. Kellennan (no. 5034), S. E. Meek and 

 A. L. Smith, January 14, 1906. 



Chaetophora sp. 



( 'h;i tophora sp. 



Colonies very small, bright green, soft, flat, confluent; filaments radi- 

 ating from the center, diehotomously branched, erect and suhparallel, 

 not fasciculate at summit; terminal branches finely pointed, not seti- 

 ferous; cells of main filament 5-6 mic. wide, 4-5 times as long. On old 

 twigs and stems of woody plants which had been thrown in the water in 

 a sheltered place. Lake Amatitlan. W. A. Kellennan (no. 5069), 

 .June 30, 1906. Thismaterial is in a young condition, somewhat abnormal, 

 and softened by formalin. 



Melosira granulata. 



Melosira granulata (Ehr.) Ralfs in Pritch. Inf. 820. 1861. 



In bottom of river with very swift current. Two feet deep. Rio Micha- 

 toya, one-half mile from Lake Amatitlan of which this river is an outlet, 

 Altitude 3,950 feet. W. A. Kellennan (no. 5054), January 26, L906. 



? Batrachospermum sp. 



? Batrachospermum (Chantransia stage). 



('ells of main filament 13 mic. wide, :'>7-('>~> mic. long. No reproductive 

 cells present. Associated with Lyngbya lagerheimii. On stems and on 

 lower branches of trees in water. Lake Amatitlan. W. A. Kellennan 

 (no. 5068), January 30, 1906. 



