214 Rhodora [November 



"Desmids of the United States (8)"; several species of Clostcrium in 

 Cnshman's "New England species of Clostcrium (4)"; two species 

 in his "New England Saccodermae (3)"; and two species distributed 

 in the Phycotheca Boreali-Americana of Collins, Holden and Setchell 



(1). 



II. The Collecting of the Material. 



The material which forms the basis of this report was collected in 

 three types of habitat; in bogs, in swamps, and in ponds and lakes. 

 Thirty-one localities were visited in the course of the collecting, and 

 the yield was found to vary greatly according to the type of habitat. 

 In respect to number of species, it was found that the bogs, three of 

 which were visitefd, resulted in the least yield — ten to twenty species 

 to each collection. The swamps seemed a slightly more favorable 

 habitat, for of the nine swamps visited, each one resulted in a yield of 

 from fifteen to thirty species. But by far the best habitat seemed to 

 be the swampy margin of the small meadow pond, or the marshy 

 coves of the larger lakes. Here, in the quiescent but clear water, 

 the floating and submerged masses of moss, sphagnum or aquatic 

 plants contained an abundant desmid flora. One small pond at 

 Morris, not over fifteen yards wide, yielded fifty-two different species 

 in abundance; and squeezings from floating masses of Riccia fiuitans 

 and Drcpanoeladus at Lake Congamond and Lake Quassapaug re- 

 sulted in a yield of over seventy desmids at each locality. Without 

 exception, sphagnum appeared to be a less favorable habitat than 

 floating masses of moss or grass, or submerged masses of Myriophyllum 

 and Chara. 



All of the counties in Connecticut were visited by the writer except 

 Tolland, Windham and New London. The places of collection were 

 distributed as follows: 



Litchfield County: Bethlehem (Longmeadow Pond); Litchfield 

 (a, Bantam Lake, and b, swamp in the "Pines"); Morris (small 

 pasture pond); Plymouth (ice pond near Waterville); Thomaston 

 (sphagnum swamp); Washington (Lake Waramaug); Watertown 

 (small meadow pond fringed with sphagnum). 



Hartford County: Southington (small < meadow pond); Suffield 

 (Lake Congamond). 



Fairfield County: Monroe (a, pond near Stepney, and b, swamp 

 at East Village); Newtown (Botsford tamarack bog). 



