193 
II. HETEROKONTAE. 
Series I. Vaucheriales. 
VAUCHERIACEAE. 
Vaucheria, DC., 1805. 
V. Dillwynni, Ag. Syst., 173. On damp ground near the water- 
lily pond, April, 1 1902. 
V. sessilis (Vawch.), DC. Flor. Fr.,1I.,63. On rocks below and 
— water in the temperate house pool, March, 1902 ; in the side 
anks of the water-lily house, April, 2;in a glass vessel with 
deat in the Herb. Dptmt., June, 1902. Sexual organs were 
sent in every case (cp. also Bennett in Journ. Roy. Micr. 
Bar 1897, 511). 
V. geminata ( Vauch.), DC. loc. cit.,62. In the side tanks of the 
disol house, fruiting in April, 902. 
Var. racemosa, Walz. Lake, April, 1902. The curious 
sexual branches "were well develo ped. 
hamata ( V. iain ), Lyngb. Hydroph., T1, t. xx., fig. c. On soil 
in Se pot (Massee !). 
*V. terrestris, Lyngb. loc. cit, TT. On soil in plant pot 
(Massee !). 
t fabserosporm Nordst. Bot. Notis. 1878, 177, t. 2. Thames 
at Kew (cp. Cooke in Journ. Quekett Micr. Club, ser. 2, vol. 2, 
p. 219 ! 
Series IT. Confervales. | 
1. BOTRYDIACEAE. 
Botrydium, Wallr., 1815. 
*B. granulatum, L. “On mud on shore of lake, common iring 
3? 
some seasons. Men !) 
2. CONFERVACEAE. 
Conferva ( Linn.), Link, 1820. 
C. bombycina, Ay. Syst., 83. Formed a compact green layer on 
outside ledge of weit tebe house, 1902. The cells of this species 
were generally filled with granules s of oil; no starch was present 
(ep. Wille in Nat. Pfl. I, 2, p. 85 
Seiadium, Braun, 1855. 
S. arbuscula, Braun Alg. Unicell., 106, t. 4. On Cladophora in 
laboratory tank, Aeri DOR. 1902 (isolat ed). 
Ophiocytium, Näg., 1849. 
*0. cochleare Save ), Braun loc. cit., 54. Lake (Massee !). 
O. circinatum, Wolle, was observed in the higher reaches of the 
Thames, and a close sect would probably also diselose it in the 
river at Kew. 
13757 rie N 
