Cyclotella dallasiana Wm. Sm.
Common in the blue clay.
Pl. [2], Fig. 9.
CYCLOTELLA MENEGHINIANA KUETZ.
Frustule in zone view rectangular, undulated; valve, 10-20 µ in diam., marginal striæ robust and transversely punctate, centre radiately punctate.
Cyclotella kuetzingiana Wm. Sm. (not Thwaites).
Crum Creek.
Pl. [2], Fig. 8.
CYCLOTELLA MENEGHINIANA, VAR. STELLIGERA CL. AND GRUN.
Differs from the type in the coarse radiating lines at the centre.