Valve elliptical-lanceolate, obtuse; striæ, 14 in 10 µ. L. 119 µ.
Pavonia, N. J., artesian well. Rare.
The only specimen found is asymmetrical with respect to the transverse axis.
On Plate [40], Fig. 4, is illustrated an abnormal form of Stauroneis, apparently near S. acuta, having an elongated central nodule and radiating, curved and coarsely punctate striæ. Blue clay.
STAURONEIS SMITHII GRUN.
Valve lanceolate, inflated in the middle and at the ends, which have diaphragms and are produced into rostrate apices; stauros reaching the margin; striæ parallel, about 25 in 10 µ (28 to 30, Cleve), distinctly punctate.
Not uncommon in meadow pools near Newtown Square.
Pl. [27], Fig. 11.
STAURONEIS CRUCICULA (GRUN.) CL.
Valve lanceolate, with obtuse, produced ends; stauros bifid; striæ, 24 in 10 µ, oblique, parallel to the branches of the stauros, closer at the ends, punctate. L. 32 µ.