II.—On a Fossil Butterfly belonging to the Family Nymphalidæ, from the Stonesfield Slate near Oxford, with Notices of Two other Foreign Forms from France and Croatia

Extract

Genus Palæontina, Butler (fossil). Frontwing ovate triangular; costal nervure much swollen at base; subcostal four-branched, the first two branches emitted about half-way between discoidal cell and apex; the third emitted abnormally just beyond the cell, and therefore springing from beneath the nervure; the fourth emitted in a still more unusual manner from the third; so that the third and fourth branches might be described as springing together from a footstalk emitted from beneath the subcostal; discocellular and discoidal nervures precisely as in Caligo; median branches nearer together than in Caligo; submedian nervure following the same direction as the median nervures, but even more distinctly inarched, so that the internal area is considerably widened: hindwing and body wanting. Type Palæontina oolitica.