Pl. [20], Fig. 10.
DIPLONEIS OCULATA (BRÉB.) CL.
Valve elliptical; striæ radiate at the ends, about 20 in 10 µ, coarsely punctate. L. 23 µ.
Fresh water.
Pl. [26], Fig. 7.
The figure is drawn from Brébisson's original material in H. L. Smith's Type Slide No. 299.
Navicula oculata Bréb.
Reported from New Jersey. I have not seen this species in this locality. Navicula oculata, referred to by Kain as occurring in Shark River, is not this form.
DIPLONEIS GEMMATA (GREV.) CL.
Valve oblong-linear, with cuneate ends and parallel or slightly concave sides; central nodule large; horns parallel; furrows about one-third the width of the valve. Costæ about 5 in 10 µ, alternating with double rows of fine puncta; short costæ occur along the borders of the horns.