490 Systematic Paleontology 



The genus Aralicepkyllum of Fontaine must not be confused with 

 AraliopTiyllum, a name proposed by Debey in manuscript for certain Upper 

 Cretaceous leaves from Aachen in Ehenish Prussia and published by 

 Schimper in 1874/ 



Arali^phyllum crassineeve (Fontaine) Berry 

 Plate XCV, Figs. 1-3 



Platanophyllum crassinerve Fontaine, 1890, Mon. U. S. Geol. Survey, vol. xv, 



1889, p. 316, pi. clviii, fig. 5. 

 AralicepJiyllum oMusilobum Fontaine, 1890, Mon. U. S. Geol. Survey, vol. 



XV, 1889, p. 317, pi. clxiii, figs. 1, 4; pi. clxiv, fig. 3. 

 Araliwphyllum acutilohum Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 



1889, p. 318, pi. clxiii, fig. 2. 



Description. — Leaves of medium or small size ranging from 6 cm. to 

 10 cm. in length by from 5 cm; to 10.5 cm. in greatest width, orbicular 

 in general outline. Primarily palmately trilobate, usually with a 

 subordinate lobe on the outside of each lateral lobe, occasionally two 

 such lobes are developed and sometimes the apical lobe is also sub- 

 lobate. Texture coriaceous. Lobes usually broadly ovate in outline 

 with generally rounded (occasionally acute) tips. Sinuses rounded, the 

 main ones rather narrow and extending about half way to the base of 

 the leaf. Subordinate sinuses shallower and more open. Petiole, pre- 

 served for a length of 3 cm. in one specimen, stout, as is also the midrib. 

 Lateral primaries two in number (one on each side), coarse in calibre, 

 branching from the midrib at or near its base at angles of about 30° 

 and running to the tips of the main lateral lobes. On the outside a 

 short distance above their point of insertion they give off rather stout 

 laterals which run to the tips of the principal subordinate lateral lobes. 

 The true secondaries are numerous in all of the lobes; they are com- 

 paratively fine in character and camptodrome. The base of the leaf 

 is cuneate in outline and slightly decurrent on the petiole. In some 

 of the broader leaves the base approaches a truncate outline. 



As constituting this species the writer has combined Platanophyllum 

 crassinerve, AralicepJiyllum oMusiloljum and Aralicephyllum acutilohum 



"■ Schimper, Pal. Veget., t. iii, 1874, p. 38. 



