1905] Collins, Phycological Notes of Isaac Holden 241 
Vaucheria sessilis (Vauch.) DC. 581. Brookfield. May. 
Batrachospermum anatínum Sirdt.? “A single frond among Bats 
collected in Bruce’s Brook, north of R. R., Apr. 20. Beautiful bluish 
green.” 
B. Boryanum Sirdt. 3, 7, 10, 16, 187, 196, 202, 206, 210, 212, 219, 
228, 248, 252, 275, 283, 556. Mouth of little stream emptying into 
the east side of Berkshire Mill Pond; side stream of Pequonnock 
River, below Factory Pond dam. Feb., May, Nov., Dec. 
B. Corbula Sirdt. 11 =P. B.-A. 184. In a little stream run- 
ning through swamp near old quarry, northwest of poorhouse, May 
11. “May 30, collected in same spot as May 11. Hunted the 
stream a long way. Could find none except in one spot within the 
space of a yard." 259,292. On sticks in still water, upper part of 
pool below Factory Pond dam. Mar.—May. 
B. ectocarpum Sirdt. 5, 289 =P. B.-A. 183. In side stream 
of Pequonnock River, below Factory Pond dam; Island Brook, near 
mouth. Jan.—March. 
B. moniliforme var. typicum Sirdt. 22 =P. B.-A. 180. Island 
Pond Brook. May. 
B. moniliforme var. chlorosum Sirdt. 2,165, 186, 188, 197, 198, 
201, 207, 209, 213, 215, 220, 226, 249. Side stream of Pequonnock 
River, below Factory Pond dam. Oct, Jan. “Oct. 5, the first Bat 
I have found here this season; could see none a week ago.” | 
B. pyramidale Sirdt. 933 =P. B-A. 186. On old sticks in 
still water, pool below Factory Pond dam. May. 
B. vagum Ag. 8, 204, 214, 218, 224, 235, 247, 526, 631, 835, 884, 
902, 1166. Outlet of little pond near paper mill, below Factory 
Pond dam. Oct.—Feb., Apr., June, July. 
B. virgatum Sirdt. 15,253,270, 276. 284, 291,825, 1165. Small 
stream running under R. R., a little way east of Stratford depot; 
Island Brook; Ash Creek, below saw mill; Pequonnock River, below 
Factory Pond dam. Nov., Feb.—May. 
Lemanea fucina var. rigida (Sirdt.) Atk. 45,350. Island Brook; 
Great Falls of the Housatonic, on rocks in the natural dam at the 
crest. June. 
Tuomeya fluviatilis Harv. 24, 41, 44, 64, 516, 576, 883, 956, 1164, 
1232. Pequonnock River; Island Brook; Mill River, near Samp Mor- 
tar Rock. May-July, Oct.-Dec. “Nov. 15, in great abundance in 
Pequonnock River, near old mill just above Trumbull line, at falls.” 
