DESCRIPTIONS OF SPECIES. 135 



those of Coccoloba, and must have belonged to some plant having much 

 the habit of G.uvifera; but the leaves of that plant are entire, and the 

 nervation is quite different. One of the other species of Coccoloba, which 

 grows in the West Indies, C. divers if olia, has leaves with a marginal 

 serration, and a nervation more like that of the leaves before us, but both 

 margins and nerves are unlike. 



The leaves which I have designated by the name of Phyllites cupa- 

 nioides, as it seems to me, should be generically united with these. 



Formation and locality: Tertiary (Fort Union group). Fort Union, 

 Dakota. 



Phyllites cupanioides Newb. 



PL XLI, figs. 3, 4. 



Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 74; Ills. Cret. and Tert. PL 

 (1878), PL XXVI, figs. 3, 4, under P. venosus. 



"Leaves large, fleshy, ovate, elliptical in outline, rounded at base, 

 sub-acute at summit, margins coarsely and obtusely toothed above, simple 

 or waved below; nervation pinnate, strong; midrib straight or flexuous, 

 lateral nerves, about six on each side, crowded below, more remote above, 

 basilar pair short and simple, uniting above with the tertiary branches of 

 the second pair to form a marginal festoon, middle secondaries each 

 bearing one or two branches near the summits, upper one simple; tertiary 

 nervation distinct, forming lattice-like bars connecting the secondary 

 nerves at right angles." 



These line leaves exhibit a resemblance in their texture and crenate 

 margins to those to which I have given the name of Phyllites carneosus. 

 They are, however, of different form, and have more simple and rectilinear 

 nervation. The collection of Dr Hayden contains a great number of frag- 

 ments of this species, but up to the present time I have failed to find 

 among living plants any which afford a satisfactory comparison with them. 

 A general similarity in form and nervation to Cupania, and especially to 

 C. Americana, has suggested the name adopted, but it can not be said that 

 the correspondence is very close. 



Formation and locality: Tertiary (Fort Union group). Fort Union. 

 Dakota. 



