Colletonema neglectum Thwaites.
Fresh water.
Pl. [26], Fig. 19.
NAVICULA RAMOSISSIMA (AG.) CL.
Valve lanceolate, sub-acute; axial area very narrow; central area scarcely widened; striæ, 12 in 10 µ, parallel throughout. L. 45 µ.
Micromega ramosissimum Ag.
Schizonema smithii Kuetz. (not Ag.).
East River, N. Y.
Pl. [26], Fig. 14.
NAVICULA ANGLICA RALFS