70 
Norman^ on Dlatomacece. 
N. punctulattty Sm. — Rare in brackish water. Stallingbro\ 
Marsh Chapel. 
N. pusilla, Sm. — Not uncommon in brackish or fresh water. 
Wawne. Market Weighton Canal. Small ditch near 
River Hull, above Stoneferry . Cottingham. Thornton- 
le-Moor, Mr. Robt. Harrison. 
N. tumida, Sm. — Rare. In a gathering from Cottingham. 
N, dicephala, Kiitz. — Rare. In a ditch near the Farm House 
Haltenprice. Cottingham. 
N. cryptocephala, Kiitz. — Very abundant in almost every salt 
and brackish water ditch. River HuU. Humber Banks, 
pure. Victoria Dock Timber Pond. Market Weighton 
Canal. Dairy coats. 
N. bacillum, Ehr. — Rare in Hornsea Peat Deposit. 
N. lavissima, Kiitz. — Frequent in fresh- water gatherings, 
though never abundant. Rocky stream, Saltersgate. 
Nettleton. Cottingham frequent. Hornsea Peat Deposit. 
Haltenprice. Wawne. 
N. limosa, Kiitz. — Very scarce in fresh water. Spring at 
Cottingham. River Hull, near Wawne. 
N. Hennedyii, Sm. — Rare in Ascidians. 
N. Lyra, Ehr. — Ascidians. Dredgings, Flambro^ Head. 
N. Lyra, var. ^, Greg. — Rare, Ascidians. 
N. humerosa, Breb. — Not unfrequent in a sand-washing, 
Hornsea. Tetney. 
A^. Crabro, Ehr. — Rare, Ascidians. 
N. didyma, Kiitz. — Not unfrequent in salt and brackish water. 
Frequent in a ditch near River Hull, above Stoneferry. 
Marsh Chapel a good gathering. Grimsby. Abundant 
in Ascidians. 
N. binodis, Ehr. — Very rare in fresh-water gatherings. Be- 
verley Parks, near Woodmancy. Market Weighton 
Canal. Thornton-le-Moor. 
N. Bombus, Ehr. — Rare in Ascidians. 
N. Scita, Sm. — Very local in fresh-water gatherings. Springs 
at Newbald. Cottingham near Springs. 
N.Barclay ana, Greg. — Frequent in a sand-gathering, Hornsea. 
N. mutica, Kiitz. — Rare. Posts in salt water. Dairy coats. 
N. libellus, Greg. — Rare, Ascidians. 
N. retusa, Breb. — Rare, Ascidians. Dredgings, Flambro' 
Head. 
N. apiculata, Breb. — Rare. In an Ascidian gathering. 
iV bacillaris, Greg. — Local in fresh water. Cottingham. 
Frequent in a spring two miles north of Cottingham. 
N. follis, Ehr.— Rare. Market Weighton Canal. Beverley 
Parks. 
