CYPERACITES sp.

Pl. I, fig. 9.

The collection contains a single specimen that appears to be the leaf of a large cyperaceous plant. It is about 1 cm. in width and has about 10 ribs or striae through it, but there is hardly enough to afford any characters of importance, and it is included simply to show that this type of vegetation was present.

Locality.—Mascall beds, Van Horn's ranch, 12 miles west of Mount Vernon, Grant County, Oregon. Collected by Knowlton and Merriam, July, 1901 (U. S. Nat, Mus., No. 8542).