DESCRirTIOX OF TIIK SPECIES. 285 



sions. The nervation is something' like that of Flcus prntofjaa, Ettings- 

 liausen, from tlie Cretaceous strata of Niederscliona.' The irregularity of 

 the areolatioii, thu slenderncss of the ])riMiary nerves, Mud the i>ro|)(ntioii- 

 ally very strong ultimate reticulation make the leaf more like some J'mlcas 

 than any other living forms 



Pkotk.ei'HVLLIim ovatum, sj). nuv. 



riato CXLI, 1m-:. 1. 



Leaves of medium size, ovate-acute, with the tij) bent to one side, 

 abruptly rounded at base, and subcordate; midnerve very thick and appar- 

 ently somewhat succulent ; primary nerves very slender, going off nearly 

 opposite in pairs, basal pair leaving at a very large angle and curving 

 strongly around a})proximately parallel to margin, those higher up leaving 

 at more and more acute angles, curving gently nutil near the margin of the 

 leaf, and then bending strongly nj)wards, gradually approaching the mar- 

 gin, sending otf slender branches, which anastomose to form large, lax, and 

 mostly irregular quadrangular primary meshes ; ultimate meshes variable 

 in size, distinctly defined, and formed chiefly by the meeting" of the nerves 

 under large angles. 



Locality : Fredericksburg ; oid\ one specimen found. 



This leaf of moderate size is noteworthy for the great thickness of its 

 midril), the unusual slenderness of its primar\' nerves, and the irregularity 

 of its nervation. This, like the preceding, belongs to the elongate section 

 of Protcivphijlhan. The leaf seems to have been somewhat inequilateral. 

 The nervation has some of the characters of the Celastrinece, as shown in C. 

 Scandens. 



PliOTE.Iil'HYLLUM ELLIPTICUM, sp. IIOV. 

 Plate CXLII, Figs. 1,'J. 



Leaves rather large, oval-elliptical in form, subacute at suunnit, rap- 

 idly rounded at base, and then narrowed gradually into the ])etiole; mid- 

 nerve very thick, and apparently somewhat succulent ; primary lateral 

 nerves very slender, going off at an oblique angle, arching upwards ap- 



' KreiiUllora voii Niedcrscbona, PI. II, Fig. 5. 



