Pl. [32], Fig. 4.
NITZSCHIA COMPRESSA (BAIL.)
Valve elliptical-lanceolate, sometimes acuminate; striæ, 6 or 7 in 10 µ, coarsely punctate. L. 56 µ.
Pyxidicula compressa Bailey.
Nitzschia punctata (Wm. Sm.) Grun.
Tryblionella punctata Wm. Sm.
Common along the coast.
Pl. [39], Fig. 7.
Var. minor (H. L. Smith).—Valve acuminate; striæ, 8 in 10 µ. L. 22 µ.
Pyxidicula compressa var. minor H. L. Smith, Type Slide No. 431.