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S. affinis. (Kiltz.) Not uncommon in the Breydon ditches. 
S. investiens. (8m.) Thickly covering Cladophora rupestris , 
growing on some floating timber at Scratby. 
S. pulchella. (Kiitz.) Occurring in most salt and brackish- water 
gatherings, but not plentifully. 
S. vaucheria. 1 (Kiitz.) A small Synedra occurs in the Ormesby 
gatherings, which I doubtfully refer to this species. 
S. 1 cvmdiformis. (Schmidt.) Very rare — stomachs of Noetilucae, 
Yarmouth ; Hunstanton Sands. 
Genus Asterionella Hassell. 
A. Formosa. Hassell. Hare — Ormesby Broad ; in a pond on 
Household Heath, Mr. Brightwell. 
A. elegans. (Heiberg.) In sediment from water supplied by the 
Water Company, Norwich. 
A. Bleakeleyii. (Sm.) Hare — Yarmouth sands, mixed with 
Uhcetoceros armatum. 
Genus Doryphora KUtzing. 
D. ampiiiceros. Kiitz. Brackish- water ditches, Yarmouth, 
Breydon, Wells ; sand gatherings, Hunstanton ; stomachs 
of Noctilucai, Yarmouth. 
Genus Tabellaria Eurenberg. 
T. flocculosa. (Kiitz.) Ormesby, Horning ; Osier Car, Heigham. 
T. fenestrata. (Kiitz.) I have only found this form in the 
Ormesby gatherings. 
Genus Grammatophora Ehrexberg. 
G. marina. (Kiitz.) Growing luxuriantly on sea-weed attached 
to Scratby buoy. 
Genus Rhabdonema Kutzing. 
R. ARCUATUM. Kiitz. Very fine and pure on Ceramium rubrum, 
Cromer. 
Genus Striatella Agardh. 
S. unipunctata. Ag. Very rare — on sea- weed, Cromer. 
D D 2 
