1905] | Collins, Phycological Notes of Isaac Holden 237 
N. pruniforme Ag. 1145 = P. B.-A.657. Twin Lakes, Salisbury. 
Aug. “In stagnant arm of lower lake cut off by R. R. near station. 
Mostly resting on bottom, attached when young to sticks, stones, etc., 
growing up to a diameter of about 2 inches." 
Scytonema crispum (Ag.) Bornet. 192, 1158, 1225. On rock 
below Factory Pond ; ditch at North Haven. Sept, Nov. “Oct. 2, 
1898, Scytonema crispum has disappeared from the old station in 
North Haven.” 
S. Hofmanni Ag. 740. On old stump, shore of upper Twin Lake, 
Salisbury. Oct. 
S. Myochrous (Dillw.) Ag. 697, 739, 1048. “On rocks in upper 
Twin Lake, near shore, submerged, but alive to some extent above 
submerged portion.” Oct. 
S. figuratum Ag. 1427, 1428, 1438, 1454, 1517 =P. B.-A. 857. 
Banks of the Housatonic, near Gaylordsville, in tufts or sheets on 
limestone. June, Oct. 
S. ocellatum (Dillw.) Thuret. 698. Sage’s Ravine, Salisbury, on 
dripping rocks. Aug. 
Nostochopsis lobatus Wood. 1159. On stones in brook at Mt. 
Carmel. Sept. 
Tolypothrix lanata (Desv.) Wartmann. 182, 191, 216, 500, 706, 
1153. On Zontinalis in Pequonnock River, below Factory Pond dam ; 
Lake Saltonstall, near New Haven. Sept.—Dec. 
Stigonema mamillosum Ag. 354, 628. On damp rocks in Mill 
River, near Samp Mortar Rock; on stones in Pequonnock River. 
July. 
S. minutum (Ag.) Hass. 1050. On submerged rocks in Plantain 
Pond, Salisbury. Oct. 
S. panniforme (Ag.) Born. & Flah. 1052. On moist rocks, Sage’s 
Ravine, below first falls, Salisbury. Oct. 
Amphithrix janthina (Mont.) Born. & Flah. 1434. Coating stones 
in Island Brook, below R. R. Oct. 
Calothrix Braunit Born. & Flah. 503, 885, 903, 1061. Forming 
a coating on stones, side stream of Pequonnock River, below Factory 
Pond dam. Oct. 
C. fusca (Kütz.) Born. € Flah. 544. On Batrachospermum 
vagum, pool below Factory Pond dam. Oct. 
C. parietina (Nag.) Thuret. 733,734=P. B.-A. 11, 742, 1228, 
1347. Onstone dam of Factory Pond; on dripping rock by R. R. 
