Mastogonia, genus, xlviii, 326.f
Meridion vernale, xlii, 103.f
Micrastenas Boryana, xli, 293.f
— tetras, xli, 293.f
—, xli, 293.f
Microtheca octoceros, xli, 304.
Naunema, xliii, 326f;
–N. —, xliii, 327.f
Navicula, xlii, 96.
— concentrica, xlvi, 139.f