147 
APOCYNOPHYLLUM MaCKINLAYI, Sp. 710V. 
Plate XIII, Figs. 6, 7. 
Sp. Char. — A. foliis subcoriaceis, oblongo-ellipticis vel lanceolatis, 
utrinque paullo angustatis, margine integerrimis ; nervationc camptodroma ; 
nervis secundariis subangulis G5-7o° orientibus, numcrosis distinctis planis, 
approximatis, rectis vel ante marginem antrorsum curvatis simplicibus, inter 
se conjunctis ; nervis tertiariis subangulis subrectis exeuntibus, numcrosis, 
ramosis, dictyodromis ; reticulo evoluto. 
Ohs. — According to the sharply prominent margin of the fossil it 
might be supposed that the texture of the leaf was firm and rather coriaceous, 
but its broad and flat main-nerves indicate a smoother leaf, at once being 
lactescent. Its form varies from elliptical to lanceolate, and it sometimes 
seems to be more or less oblique ; but a closer investigation easily proves 
that the latter appearance is accidental, caused by displacement or distortion 
after their deposition. Both ends of the leaf are less narrowed, and the 
margin is entire. The nervation exhibits the type of Apocyneae, especially 
of Allamanda and Plumeria. The numerous secondary nerves are approxi- 
mate, parallel, diverging at rather acute angles, and remind us of those of 
Apocynophyllum eni/ngense, TIeer, A. helveticum , Ileer, and other species of 
the European Tertiary Flora. 
Locality and Horizon. — Witherden’s Tunnel, Two-mile, near Emina- 
ville (Vegetable Creek Township), on Vegetable Creek Main Beep Lead; 
brown carbonaceous clay, under basalt. 
APOCYNOPHYLLUM CRASSUM, sp. nOV. 
Plate XIII, Fig. 9. 
Sp. Char. — A. foliis coriaceis crassis, brevissime pctiolatis lanceolato- 
oblongis, utrinque obtusis, margine revoluto integerrimis ; nervatione campto- 
droma ; nervo primario firmo, cxcurrcnte ; nervis secundariis angulo recto vel 
subrecto exeuntibus, abbreviate vix curvatis ; nervis tertiariis inconspicuis. 
Ohs . — This leaf appears to be strikingly thick and coriaceous, as indi- 
cated by the comparatively thick carbonaceous substance of the fossil, partly 
adhering to it. It is 2G millimeters in length and 4^ millimeters in breadth, 
very shortly petiolate, obtuse at both ends ; its margin being somewhat 
