215 
S. ovalis, Bréb. Cons. Ktz. Bac. 61, t. 30, f. 64. Amongst 
Cladophora on banks of lake, January, 1902 ; plankton of Thames 
at Kew, August, 1902. 
S. ovata, Kiz. Bac., 62, t. 1, f. 1-4. Amongst Tolypothrix and 
prie on walls of nian fern house, June, 1902. 
Cymatopleura, Sm., 1853. 
- elliptica (Breb.), Sm. Diat., i., 37, t. 10, f. 80. Moat, May, 
1902. 
C. Solea ( Bréb.), Sm. Diat., i., 36, t. 10, f. 18. Laboratory tank, 
lake, temperate house pools, May- August, 1902; plankton of 
Thames at Kew, August, 1902. 
Epithemia, Bréb., 1838. 
E. turgida (Hhrb.), Ktz. Bac., 34, t. 5, f. 14. Lake, September, 
1902. ; 
E. Westermanni (Ehrb.), Ktz. Bac., t. 5, f. 12 et., t. 30, f. 4. 
Amongst Gloeocapsa on walls a oe ca fern hou use, August » 
902; amongst blue-green Algae on stones in Victoria regia 
house, September, 1902 
Cymbella, Ag., 1830. 
C. gastroides, Kitz. Bac., 73, t. 6, f. 4b. Plankton of Thames at 
Kew, August, t, 1902. 
C. affinis, Ktz. Bac., 80, t. 6, f. 15. Laboratory tank, March, 
1902. 
C. ventricosa, Ag. Consp. crit. Diat., i, 9. Amongst Oscillaria, 
&c., on walls of pit belonging to tropical fern house, September, 
1907? ; amongst Cladophora in pit, Herb. Dptmt., September, 1902. 
Cocconema, Hirb., 1829. 
C. cymbiforme (Ktz.), Ehrh. Abh., 1835. On Cladophora, tem- 
perate house pools, March, 1902. 
C. tumidum, Bréb. in Kitz. Spec. 1849, 60. Middle tank of 
water-lily house, July, 1902 ; temperate house pools, September, 
1902. 
Encyonema, Kiz., 1834. 
E. prostratum (Berk.), Ralfs in Ann. and Mag., 182, t. 18, f. 3. 
Amongst Ulothriz i in pond, March, 1902. 
Amphora, Ehrb., 1831. 
A. coffeaeformis (Ag.), Kíz. Bac., 108, t. 5, f. 37. Amongst 
Gloeocapsa on walls of tropical fern house and of Victoria raa 
house, August, 1902. 
A. ovalis, Ktz. Bac., 107, t. 5 ^ 35 et 39. Plankton of Thames 
at Kew, v, August, 1902. 
