[Vor. 4 
294 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
All of the algae listed were collected during August, 1915, 
although samples sent from time to time at earlier and later 
dates have been useful in providing additional material for 
further study. Acknowledgments are due to Professor R. T. 
Young, Director of the Station, who made the securing of the 
algae possible, and to Mr. Е. б. Moeberg, for assistance in 
collecting. No attention was paid either to the Bacillarieae 
or Peridineae since these two groups have been assigned to 
other collectors. 
Class MYXOPHYCEAE 
Order COCCOGONEALES 
Family CunoococcACEAE 
Genus APHANOTHECE Naegeli 
Aphanothece Castagnei (Bréb.) Rabenhorst, Fl. Eur. Alg., 
Sect. 2: 64. 1865. Abundant. Associated with other free- 
floating forms. 
Genus cHRoococcus Naegeli 
Chroococcus limneticus Lemmermann, Bot. Centralbl. 76 : 
153. 1898. 
Chroococcus minutus (Kuetzing) Naegeli, бай. einz. Alg. 
46. 1849. 
Both species common. Associated with other algae along 
shore. 
Genus cLATHROCYSTIS Henfrey 
Clathrocystis aeruginosa (Kuetzing) Henfrey, Mie. Jour. 
1856:53. 1856. Abundant in towings and associated with 
filamentous algae. 
Genus COELOSPHAERIUM Naegeli 
Coelosphaerium Kuetzingianum Naegeli, Gatt. einz. Alg. 
54. 1849. Abundant. Associated with Clathrocystis and 
other free-floating forms. 
Genus GOMPHOSPHAERIA Kuetzing 
Gomphosphaeria aponina Kuetzing, Tab. Phye. 1: pl. 31. 
f. 3. 1845-49. Not as abundant as the previously listed 
