236 Rhodora [NovEMBER 
O. splendida Grev. 144, 775, 1063, 1149. Bed of Pequonnock 
River, in a still pool with decaying vegetable matter. Aug., Sept., 
Nov. 
O. tenuis Ag. 143, 158, 164, 162, 584, 891, 954, 959, 1229. 
Floating, pool below Factory Pond; Housatonic River, on wall of 
quartz mill; Fresh Pond; Bruce's Brook. May-Oct. 
O. tenuis var. natans (Kütz). Gomont. 1163,1482. Bruce's Brook. 
Oct., Dec. 
Phormidium Corium (Ag.) Gomont. 743, 924, 934 — P. B-A. 
304. On stonework of dam at R. R. crossing, Bruce's Brook; on 
dam at Moody's Pond; Island Brook, below Housatonic R. R., on 
woodwork of dam. Apr., May, Oct. 
P. favosum (Bory) Gomont. 51. Stratum adhering to rocks in 
shoal running water, Great Falls of the Housatonic, below Lovers’ 
Leap. July. 
P. Retzii (Ag.) Gomont. 710 = P. B.-A. ac, 716, 946, 958, 1414. 
Stream below Paper Mill, Pequonnock River; Rooster River. June, 
July, Sept. 
P. uncinatum (Ag.) Gomont. 660,947, 1420. “Forming a purplish 
or copperish skin on stones in stream below dam at Moody's Pond”; 
Mill River. June, July, Sept. : 
Lyngbya ochracea (Kütz.) Thuret. 1062, 1333. Stream below 
paper mill, Factory Pond; outlet of Parrott's Pond. Oct., Nov. 
Plectonema Wollei Farlow. 166. On stones in swift running 
water, Housatonic River, below Great Falls. Oct. 
Schizothrix lardacea (Cesati) Gomont. 1227. On vertical surface 
of dripping rock, East Rock, New Haven. Nov. 
S. coriacea. (Kütz.) Gomont. 1429, 1431, 1437, 1453. On lime- 
stone, bank of Housatonic River, Gaylordsville. Apr., Oct. 
Anabaena oscillarioides Bory. 718. With other Cyanophyceae, 
pool below Factory Pond. Sept. 
Cylindrospermum majus Kütz. 445. Forming saccate investments 
of grass, Utricularia, etc., pool below Factory Pond. Sept. 
Nostoc commune Vauch. 1436. On limestone, road near Gay- 
lordsville. Oct. 
N. microscopicum Carm. 1053. Sage's Ravine, Salisbury, below 
first falls. Oct. 
N. parmelioides Kütz. 1160. On stones in brook, Mt. Carmel. 
Sept. 
