A Preliminary Report on the Alga? of the Fresh 

 Waters of Connecticut. 



INTRODUCTION. 



The present report is designed to accompany the previous 

 report upon the Fresh-water Protozoa, Bulletin No. 2 of this 

 Survey. Like that report, it is not claimed to be complete, 

 nor by any means to contain all of our Algae. But, the work 

 having covered considerable parts of four years, it is thought 

 that it will be found to contain most of the common Algae in 

 this state, and will therefore be useful as a guide to students of 

 the microscopy of our waters. To wait until all omissions 

 could be rilled would clearly postpone unduly the publication 

 of any report. For these reasons this preliminary report is 

 issued at the present time. 



Work upon the Algae is scattered somewhat widely in books 

 and in journals. We have found most valuable, The British 

 Fresh-zvater Alger, by West. Wolle's Fresh-water Algce of 

 the United States, and his similar work on the Desmids, have 

 also been found extremely useful. The magnificent work of 

 Engler and Prantl has been found of great value, as has also 

 Die Mikroskopische PHanzenwelt des Siisstvassers by Kirchner, 

 and the Analytical Keys of Genera and Species of the Fresh- 

 zvater Algce by Stokes. The most useful publication upon a 

 single group has been that of Hazen The Ulotrichacece and 

 Chcetophoracecv, in the Memoirs of the Torrey Botanical Club, 

 XXII, 1902. 



The key that we have adopted in this Bulletin is based upon 

 that given by West. We have used this because in our experi- 

 ence it has been found to be the most practical and useful. 

 We have, however, modified it in several respects to make it 

 correspond to the key used in the Bulletin on the Protozoa. 

 As so modified, we think it will be found very easy of use for 

 microscopists who are beginning the study of the Algae. 



