212 
Inactis, Kzitz., 1843. . 
ra Cresswelli, Thur. in Ann. Sci. Nat., 1875, 311. On wet 
moss in one of the pits, hone, 1902; growing in upright zellew 
bundles, about 2 mm. high. 
Lyngbya, Ag. em. Thuret, 1875. 
L. inundata (Kiitz.), Cooke Brit. Freshw. Alg., 259. Forming a 
greenish coating on the stonew ork of a tank in the private usw 
h 
house, March, 1902; common on the sides of tanks throughout 
the gardens (Victoria regia tank, Aroid house, &c.). 
L. vulgaris, Kirchn. Alg. Schl. 242. Forming a thin, papery, 
dark olive layer on the sides of a tank in the conservatory, March, 
1902; middle tank of water-lily house, September, 1902. 
. papyrina, Kirchn, Alg. Schl., 241. On the sides of a tank 
below water, pi ts of Orchid house, September, 1902. New for 
the British Isles 
L. rupestris (Ag), Cooke Brit. Freshw. Alg., 260. Forming a 
velvety green layer on the sides of a water tank above the water- 
level, pit, February, 1902; sides of Victoria regia tank, March, 
1902. 
L. solitaris (Rabh.), Kirchn. Alg. Schl., 242. Scattered amongst 
other forms on stone work in pits of Orchid house, September, 
1902. New for the British Isles. 
L. hilseana (Rabh.), Kirchn. Alg. Schl., 241. On the side of a 
tank, containing hot water, in one of the pits, October, 1902. New 
for the British Isles 
L. sudetica (Nave), Kirchn. ^e: cit., 241. Forming a dark green, 
thick, membranous stratum on the ‘ledges in No. 14, September, 
1902. New for the British lites: 
L. insignis (Thwaites). Scattered amongst Cladophora flavescens 
in water-lily pond, April, 1902 (mihi !) ; in tank (Massee !). 
Symploca, K/z., 1843. 
S. thermalis, Ktz. Phyc. Gen., 200. Growing in chinks between 
the bricks of one of the pits, October, 1902 ; forms small penicillate, 
ee tufts. As far as I am aware, this is new for the 
ritis 
Pleetonema, Thur., 1875. 
*P. Kirchneri, Cooke, Grevillea, Xi, 75. *In ornamental water. 
Pleasure grounds, Kew." (ep. Cooke, Brit. Freshw. Alg., 264 !) 
; 4. SCYTONEMACEAE. 
Scytonema, Ag., 1824. 
S. ciner Meneg. i in Kütz. Spec., 303. “ Found on the walls 
eum, 
warm houses Eit ios Royal Botanic Gardens at Kew ” (Cooke, 
d. cit, 266). This species is very common in the hotter and 
