210 
?N. rupestre, Kitz. Spec. Alg., 296. On fani rocks amongst 
mosses in temperate house, March, 1902. 
N. macrosporum, Meneg. Mon. Nost., 116, " 14, f. 2. On damp 
Aea in the rockery, January, 1902. 
Anabaena, Bory, 1823. 
A. flos-aquae, € Tab. Phyc., i., t. 94. On lake (Massee !). 
“This in some seasons forms a black-green slimy scum on the 
surface of the sur pond” (Wright!) I observed only small 
quantities on the lake in this season, 1902. 
A. variabilis, Küfz. Phyc. Gen. Amongst other blue-green Algae 
on the stonework of the tropical fern house, June, 1902. 
A. oscillarioides, Bory Dict. Hist. Nat. Forming a compact 
bluish-green s iratum around Nitella sp. in a glass vessel in pit 
of the Herb. Dptmt., February, 1902. 
Cylindospermum (Kiitz.), Ralfs, 1850. 
*C. macrospermum, Kiitz. Tab. Phyc., i., t. 98, f. 4. “On soil of 
plant pots, Herb. Dptmt.” (Massee !). 
3. LYNGBYACEAE, 
Chamaesiphon, A. Br. et Grun., 1864. 
C. confervicola, Br. Rabenh. Alg., No. 1126. On Cladophora in 
tank in No. 8; on Rhizoclonium in streamlet in rockery, September, 
C. incrustans, Grun. in Rabh. Alg. Eur., ii, p. 149. On Oedo- 
gonium in middle tank of iasa 4 house ; on Rhizoclonium in 
streamlet in rockery, September, 1902. 
Spirulina, Link, 1834. 
S. tenuissima, Kiitz. Spec. Alg., 236. Water-lily pond, amongst 
other Algae, September, 1902. 
Oscillaria, Bosc., 1800. 
O. tenerrima, Kiitz. Tab. ee i, £. 38, f. 8. On brickwork in 
d ens fern house, January, 1902 ; ; on walls of palm house, and 
n tank in conservatory (No. 4), March, 1902 ; moat, May, 1902. 
O. leptotricha, Kiitz. Tab. Phyc., i., t. 38, f. 9. 
Var. splendida, Grev. A very fine form; in the temperate 
house pools, growing attached to the roots of a ber Apri 
? 0. ies. Carm. Harv. Phyc. Britt., t. 105 B. Forming a 
blackish-green stratum on the banks of the lake, March, 1902. 
