64 
Norman^ on Diatomaceae. 
C. Hodgsonii, Sm. — Not unfrequent in a Dredging made off 
Flambro' Head. 
C. spiralis, Sm. — Not unfrequent in boggy places. Iron 
springs Haltenprice^ copious. Boggy place^ Skirlaugh. 
C. cribrosus, Sm. — Not unfrequent in salt-water Pools and 
Ditches, Humber Banks. Market Weigliton Canal. 
Marfleet. 
C. parvulus, Sm. — Eare. A scidian gatherings. 
C. decoruSj Breb. — Eare. In an Ascidian gathering. 
SuRiRELLA, Turpin. 
S. biseriata, Breb. — Not uncommon in fresh and even in 
brackish water. Cottingham. Eiver Hull. Market 
Weighton Canal. Wawne Ferry. 
S. linearis, Sm. — Not unfrequent in fresh-water localities, but 
always sparse. Cottingham. Beverley Parks. "Wawne 
Ferry. Hornsea Deposit. Market Weighton Canal. 
S. turgida, Sm. — Very rare in brackish water. Eiver Hull, 
northward of Stoneferry. North Humber Bank, Dr. 
Munroe. 
splendida, Kiitz. — Not frequent. Spring Ditch. Eiver 
Hull, near Stoneferry. Market Weighton Canal. 
S. nobilis, Sm. — Not unfrequent. Hornsea Deposit. Cot- 
tingham. Market Weighton Canal. Stoneferry, &c. 
S. striatula, Turp. — Not unfrequent in brackish water. 
Stallingbro\ Eiver Hull, near Stoneferry. Humber 
Banks. Market Weighton Canal. 
S. Gemma, Ehr. — ^Very frequent in salt-water Pools. North 
Humber Bank. Eiver Hull, Stoneferry. Quite pure at 
Patrington. Breakwater near Hessle. Pure Humber 
Banks, Mr. Eobt. Harrison. 
S. fastuosa, Ehr. — Eare. Ascidian gatherings. 
S. Craticula, Ehr. — Very rare in the Hornsea Peat Deposit. 
S. ovalis, Breb. — Not unfrequent in brackish water. Stal- 
lingbro\ Small Ditch near Eiver Hull, above Stoneferry. 
Hornsea Deposit. Ditch running from Anlaby to 
Hessle Eoad. 
S. panduriformis , Sm. — Not unfrequent in fresh water. 
Skirlaugh. Nettleton. Market Weighton Canal. Pure 
near Harrogate. 
S. Brightwellii, Sm. — Not unfrequent in brackish water, but 
never abundant. Outlet Hornsea Meer. Hornsea 
Deposit. Eiver Hull. Ditch near Stoneferry. Eeser- 
voir Waterworks. Market Weighton Canal. 
