216 
Cocconeis, Hhrb., 1835. 
C. Pediculus, Hhrb. Inf., 194. t. 21, f. 11. On Cladophora in 
tank of pit, April, 1902 ; on Rhizoclonium i in streamlet in rockery, 
September, 1902. 
C. Placentula, Harb. Inf., 194, n. 265. Laboratory tank, March, 
1902. 
Achnanthes, Bory, 1822. 
A. minutissima, Kiz. Alg. Exs. aquae dule., n. 75. On Clado- 
phora in pond and temperate house pools, Ropieuibes 1902. 
A. trinodis (Arnott), Grun. Amongst Cladophora on banks of 
lake, a 1902. As far as I am aware, this is new for the 
British Isles 
Rhoicosphenia, Grunow, 1860. 
R. curvata (Kz.), Rabenh. Alg., i., 112. 
Var. aquatica, Ktz. Growing on Cladophora giomerata Fes 
in water-lily pond, December, 1901; on Cladop n tank 
in No. " and in pond, September, 1902 ; cce tank, 
March, 1902. 
Var. salina, Kéz. On Cladophora in lake, September, 1902. 
Fragilaria (Lyngb.), Ag., 1824. 
F. capucina, Desm. ed. i, n. 453. In tank in pit of Herb. 
Dptmt. amongst Cladophora, 1902. 
F. mutabilis (Sm.), Grun. in Wien. Verh., 1862, p. 369. Plank- 
ton of Thames at Kew, August, 1902. 
F. virescens, Ralfs Ann. and Mag., xii. $4. T. a Tea May- 
September, 1902 ; plankton of Thames, August, 1 
F. Harrisonii, Sm. Diat., ii., 18. Amongst ER on banks 
of lake, January, 1902. 
Diatoma, De Candolle, 1805. 
D. Ehrenbergii, Ktz. Bac., t. 17, f. xvii. 1-3. Amongst Clado- 
phora in temperate house pools, Marais 1902. 
Rhaphoneis, Hhrb., 1844. 
R. Rhombus, Zr). Abh., 1844, p. 87. Amongst Cladophora on 
banks of lake, January, 1902; plankton of Thames at Kew, 
August, 1902, 
Synedra, EArb., 1831. 
S. longissima, Sm. Diat., i., 72, t. 12, f. 95. Plankton of pond 
April, 1902, i P Ered 
S. pulchella, Ktz. Bac., 68, t. 29 » J. 91. On Rhizoclonium in the 
streamlet in the rockery, Sept ember, 1902. - 
