New and Little Known American Paleozoic Ostracoda. 195 
The species is distinguished from O. stigmata and varieties by its 
more oval shape, and smaller and differently marked raised area. 
Position and locality: Devonian Bryozoa bed, Falls of the Ohio. 
OCTONARIA CLAVIGERA, Nl. sp. 
We MY LPs. 7 a. 0, C. 
Size: Length, 1.51 mm.; height, 0.77 mm.; thickness of one 
valve, 0.36 mm. | 
In this peculiar species the valves are suboblong, the back 
straight, rather long, and without angular extremities, the ends 
subequal and semicircular, and the ventral margin moderately 
convex, with the curve a little the strongest in the posterior half. 
Elevated area taking up nearly the entire surface, so that the edges 
of the valves appear to be very thick and concave. Center of 
area with a number of shallow pits surrounding a club-shaped 
longitudinal ridge. 
Though deviating rather obviously from the ordinary types of 
Octonaria, the characters of this species, as far as determined, do 
not appear to differ in any really essential respect from those 
required by the genus. 
Position and locality: Devonian Bryozoa bed, Falls of the Ohio. 
OCTONARIA CURTA, N. sp. 
Plate XITI, Figs. 4a,.40. 
Size: Length, 0.78 mm.; height, 0.63 mm.; thickness of one 
valve, 0.25 mm. 
Valves short, oval ; elevated area with a simple oval depression, 
without ridges except an obscure elevation on one side; edges 
slightly thickened. 
This species doubtlessly is related to O. octoformis, Jones, occur- 
ring in nearly equivalent strata in England, but its valves are 
shorter, the edges more abrupt, and the surface pattern more 
simple than in any of the known varieties of that species. 
Position and locality: Shales of the Niagara group, Lockport, 
N.Y. 
