Pl. [32], Fig. 19.
NITZSCHIA INTERMEDIA HANTZSCH
Valve linear-lanceolate; keel puncta, 8 in 10 µ; striæ about 24 in 10 µ. L. 100 µ.
Crum Creek. Not common.
Pl. [33], Fig. 2.
Nitzschiella
NITZSCHIA LONGISSIMA (BRÉB.) RALFS
Valve linear-lanceolate, with exceedingly long horns or beaks; keel puncta about 10 in 10 µ; striæ about 16 in 10 µ. L. to 500 µ.
Shark River, N. J.
Pl. [33], Fig. 1.