Delaware Bay.
Pl. [33], Fig. 8.
Bacillaria
NITZSCHIA PAXILLIFER (O. F. MUELLER) HEIBERG
Frustules united in a filament, afterwards free; valve lanceolate with nearly central keel; keel puncta, 7-9 in 10 µ; striæ about 21 in 10 µ. L. 110 µ.
Vibrio paxillifer O. F. Mueller.
Bacillaria paradoxa Gmelin.
Nitzschia paradoxa (Gmelin) Grun.
Brackish water or streams subject to its influence.
Pl. [33], Figs. 13 and 14.