Pl. [20], Fig. 14.
DIPLONEIS SMITHII (BRÉB.) CL.
Valve elliptical; central nodule not broad; furrows evenly curved on the outer edge, crossed by costæ and double oblique rows of alveoli. Variable in size and in the curvature of the furrows.
Cleve forms a new species, D. major, of the large form figured by Schmidt (Atlas, Pl. 7, Figs. 18, 19, 21 and 22), stating that the structure is much coarser and the form is larger with broad furrows. In the specimen here figured the size is median and the furrows are as in D. major.
Marine and brackish. Common.
Pl. [20], Fig. 17.
DIPLONEIS CRABRO VAR. PANDURA (BRÉB.) CL.
Valve constricted, segments tongue-shaped; central nodule small; horns narrow, nearly parallel, with a row of large puncta; costæ, 4 in 10 µ, convergent in the middle, radiating at the ends, alternating with a double row of puncta, 11 in 10 µ.
Pavonia, N. J. (artesian well).
Pl. [20], Fig. 4.