48^ Systematic Paleontology 



is present in the Cenomanian of Europe and Greenland but is replaced 

 after the Eocene by somewhat similar forms referred to modern allied 

 genera such as Cissus, Vitis, etc. 



CissiTES PAEViFOLius (Fontaine) Berry 

 Plates XCL XCII 



yitiphyllum parvifoUum Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 



1889, p. 309, pi. clxxii, figs. 11, 12. 

 Yitiphyllum multifidum Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 



1889, p. 309, pi. clxxiii, figs. 1-9. 

 Cissites oistusilohus Saporta, 1894, Fl. Foss. Port., 1894, p. 190, pi. xxxiv, 



figs. 12, 13 (non Lesquereux, 1892). 

 Yitiphyllum multifidum Ward, 1896, 16th Ann. Rept. U. S. Geol. Surv., pt. i, 



p. 539, pi. cvii, figs. 2-5. 

 Yitiphyllum parvifoUum Fontaine, 1906, in Ward, Mon. U. S. Geol. Surv., 



vol. xlviii, 1905, p. 558. 

 Yitiphyllum multifidum Fontaine, 1906, in Ward, Mon. U. S. Geol. Surv., 



vol. xlviii, 1905, pp. 553, 565, pi. cxix, figs. 2-5. 



Description. — Leaves comparatively small but somewhat variable in 

 size, the largest specimens indicating leaves about 6 cm. long by 7 cm. 

 wide. Outline somewhat variable, in general orbicular with base varying 

 from truncate or slightly decurrent to deeply cordate. Divided by deep 

 narrow sinuses into three main lobes and these in turn subdivided into 

 subordinate lobes, all terminating in shallow lobes or broadly rounded 

 crenations. Petioles stout sending off three or more rather straight 

 primaries from their tips, the central and main laterals being the stout- 

 est, the presence of additional primaries being occasioned by the degree 

 of subdivision of the lateral leaf lobes. Secondaries branching from the 

 primaries at an acute angle and running to the tips of the subordinate 

 lobes giving off acutely branched tertiaries which run to the tips of the 

 lobules or teeth: 



This is the most common form at Federal Hill, several hundred speci- 

 mens, often exceedingly well preserved, being contained in the various 

 collections which have been made. Prof. Fontaine established a new 

 genus for its reception which he called Yitipliyllum although he recog- 

 nized its resemblance to Cissus. There is really no ground for the main- 

 tenance of such a separate genus since the leaves are obviously allied to 



