1922] Hylander, — The Desmids of Connecticut 215 



New Haven County: Bethany (quaking bog); Branford (Lake 

 Saltonstall); Guilford (swamp in North Guilford); Hamden (a, Lake 

 Whitney, and b, swamp at summit of Mt. Carmel); Madison (swamp 

 at North Madison); Middlebury (Lake Quassapaug); New Haven 

 (a, Beaver Park bog, and b, pools at foot of West Rock) ; North Bran- 

 ford (a, roadside swamp at Totoket, and b, Linsley Ponds) ; Orange 

 (roadside pond) ; West Haven (a, Lake Maltby, and b, Maltby Park 

 swamp); Woodbridge (Dawson Falls pond). 



Middlesex County: Killingworth (a, swampy pond, and b, 

 sphagnum swamp). 



In the following list of species, the stations are arranged alpha- 

 betically by townships. The records are all based on material 

 collected and preserved by the writer, except where otherwise stated. 

 References to Connecticut specimens in the literature are definitely 

 indicated. Citations for the names of species and varieties are given 

 only in those cases where the forms in question are not found in the 

 four published volumes of "A Monograph of the British Desmidi- 

 aceae," by W. & G. S. West. The sequence followed is that adopted 

 by these authors in their first volume. 



In the preparation of this report, I am very much indebted to the 

 helpful criticism and inspiration of Dr. Alexander W. Evans, under 

 whose direction I commenced and brought to a conclusion this report. 

 I am likewise very much indebted to Dr. Nellie Carter, who during 

 the past year was a research fellow at the laboratory. Her critical 

 knowledge of the group was an invaluable aid to me in identifying 

 the material; without her assistance this report would have been an 

 impossibility. 



III. List of the Connecticut Species. 



[An asterisk (*) indicates that the plant is new to Connecticut; two as- 

 terisks (**) that it is new to North America; and a dagger (t) that it is known 

 only from North America.] 



GONATOZYGON De Bary 



*G. Brebissonii De Bary. Suffield. 



G. pilosum Wolle. Fairfield {Johnson, 6, p. 280; see also 3, p. 344). 



SPIROTAENIA Breb. 



S. condensata Breb. Bethlehem, Fairfield (Johnson, see 7, p. 280, 

 and also 3, p. 345), Hamden (Carter & Evans), Middlebury, Wash- 

 ington, West Haven. 



