306 THE POTOMAC OR YOUNGER MESOZOIC FLORA. 



primaries going off at equal intervals, very strongly curved upwards ; minor 

 nerves not seen ; leaf-substance thick. 



Locality : 7 2d mile post ; not very rare. 



This plant is a good deal like Euonymus glaher. 



Celastropiiyllum dknticulatum, sp. nov. 



Plate CLXIX, Fig. 10; Plate CLXXII, Fig. 7. 



Leaf very small, elliptical to ovate in shape, acute ; margins minutely 

 dentate ; midnerve slender, lateral nerves going off obliquely and curving 

 up, very slender, lower ones more oblique and arching more strongly than 

 the upper ones ; ultimate nervation not seen. 



Locality : Covington street, Baltimore ; very rare. 



Celastrophyllum latifolium, sp. nov. 



Plate CLXXII, Figs. :!, 6 ; Plaie CLXXIII, Fig. 13. 



Leaves very small, broadly elliptical to nearly orbicular, obtuse at 

 summit, flared out in the middle, narrowed to the base ; leaf-substance very 

 thin ; midnerve slender, attenuated towards the summit ; lateral nerves A^ery 

 slender, going off very obliquely, and curving in a circular manner towards 

 the tip of the leaf, opposite, connected by transverse nerves, that go off 

 nearly at right angles and make quadrangular subrhombic meshes ; ultimate 

 reticulation not seen. 



Localities : Belt and Covington streets, Baltimore. 



These leaves are quite common at the Baltimore localities. In shape 

 and nervation they are much like the living plant Cete^rMS wMtows. The 

 leaf given in PI. CLXXIII, Fig. 13, is a good deal like C. arcinerve in the 

 peculiar nervation, but it is smaller and more delicate. 



Celastrophyllum tenuinerve, sp. nov. 



Plate CLXXII, Fig. 2. 



Leaf very small, probably orbicular in shape, rounded abruptly at base; 

 midnerve comparatively strong ; primary nerves imperfectly shown, very 

 slender, going off at rather a large angle, tending outwards and then up- 



