TABELLARIA FENESTRATA (LYNG.) KUETZ.
Valve elongated; pseudoraphe narrow; transverse striæ faint. In the zone view a straight septum is shown at each end of a valve.
Common, especially in the cedar swamps and ponds of the Pine Barren region, N. J.
Pl. [8], Figs. 11 and 12.
TABELLARIA FLOCCULOSA (ROTH) KUETZ.
Valve linear, with median inflation larger than the terminal; pseudoraphe rather broad in the middle; transverse striæ subtly punctate. In zone view the frustules are quadrangular, or nearly so, with about six sometimes curved septa at one end alternating with those on the other end.
Conferva flocculosa Roth.
Common especially in the Pine Barrens of New Jersey.
Pl. [8], Figs. 8, 9 and 10.