830 SYSTEMATIC PALEONTOLOGY 



but the remains are very fragmentary, some of the larger fragments being 

 those figured. They clearly represent a species of Protophyllum distinct 

 from the preceding species and are identical with Protophyllum multi- 

 nerve in their observed characters, especially in the peculiar margin. 



Occurrence. RARITAN FORMATION. Cedar Point, Baltimore County, 

 Maryland; East Washington Heights, District of Columbia. 



Collection. Maryland Geological Survey. 



Order POLYGONALES 

 Family POLYGONACEAE 



Genus COCCOLOBITES n. gen. 

 COCCOLOBITES CRETACEUS n. Sp. 



Plate LXVIII, Fig. 1 



Description. Leaves of large size, elliptical in general outline, with a 

 broadly rounded, slightly emarginate tip, and a broadly cuneate base. 

 Length about 9 cm. Maximum width, near the middle of the leaf, about 

 6 cm. Margins entire, more or less prominently undulate, inequilateral, 

 occasionally approaching sublobate in the prominence of some of the undu- 

 lations. Petiole short and stout, or wanting. Midrib stout. Secondaries 

 stout, about seven camptodrome pairs. Tertiaries prominent, forming 

 open polygonal meshes. 



This species is obviously new, although it resembles somewhat the 

 Earitan leaf described by Newberry * as Pkyllites undulatus, which differs 

 principally in its finer venation. 



The resemblance to the leaves of the Eocene and existing species of 

 Coccolobis has suggested the proposal of a new genus allied to and 

 possibly ancestral to the latter. Coccolobis has about one hundred and 

 twenty species in the existing flora, many of which are coastal forms, and 

 all confined to the American tropics. 



Occurrence. MAGOTHY FORMATION. Grove Point, Cecil County. 



Collection. Maryland Geological Survey. 



'Newberry, Mon. U. S. Geol. Survey, vol. xxvi, p. 131, pi. xxiv, fig. 10, 1896. 



