3D E C ^ IP O 3D . 
CARIDID^. 
PAL-^OPALiEMON, Whitfield. 1880. 
Pal^opal.®mon Newberryi. 
PLATE XXX, FIGS. 20-23. 
PalCBopalmnwn Newberryi, Whitfield. Amer. Jour. Science, Third Series, vol. xix. No. 109, ji. 41. 1880. 
Unpublished plate, fig-s. 1-3; also Palaeontology of Ohio, pi. viii, figs. 19-21 (unpublished). 
Cephalothorax elongate and slender, tapering toward the anterior extremity; 
dorsum narrow; latera narrow in front, rapidly widening behind and sloping 
from the edges of the dorsum in nearly a vertical plane. Margin inflected 
on the ventral side, slightly thickened and finely sulcate just within the edge, 
on the postero-lateral area rounding in a broad forward curve to the poste¬ 
rior edge, which is conspicuously reentrant. A sharp carina extends along 
the axis of the cephalothorax and, bifurcating near the anterior extremity, 
leaves a gently concave triangular area between its branches, which does not 
show satisfactory evidence of having been produced into a rostrum. Each 
branch of the axial carina connects with the anterior extremity of a dorso¬ 
lateral carina, and between this and the axial carina the surface is gently 
concave. The entire surface is ornamented by fine, elevated, venate, fre¬ 
quently anastomosing lines, which are more conspicuous on the latera than 
on the dorsum, and have a general direction upward and backward from the 
ventral margins. From the anterior extremity on each of the latera a fine. 
