(71) 



as follows: Raritan 2, Dakota 20, Montana 2, Vancouver 6, 

 Laramie 17, Livingston 3, Denver 9, Ft. Union 7, Tertiary 

 of Yellowstone Park 7, Green River 7, Eolignitic 6, Eocene 

 12, Miocene 25, Payette 4, Pleistocene 6, Glacial i, Atane 

 7, Patoot 7, Tertiary of Greenland 15. 



Quercus HoUickii sp. nov. PI. 57. f. /, 2. 



Leaves subcoriaceous, obovate, obtuse, gradually narrow- 

 ing to the base; secondaries strong, equidistant and parallel, 

 alternate, camptodrome, angle of divergence about 50*^ ; 

 basal one third of the margin entire, above rather irregularly 

 dentate. 



These specimens evidently represent a leaf about 9 cm. in 

 length by about 4.5 cm. in greatest width. 



I have been unable to refer this to any of the described 

 species of ^lercus although it resembles several ; in outline 

 it is similar to ^. Wardiana Lesq.* from the Dakota group, 

 but the latter is 50 per cent, larger and with different vena- 

 tion. There is also a resemblance to Newberry's ^ cllip- 

 tica f but the secondaries are straighter, more ascending and 

 more regularly arched in our specimen. Again, it may be 

 compared to the Tertiary ^ Olafseni Heer, but the latter 

 has the leaves more oval, margin more dentate, secondaries 

 craspedodrome and straighter, greatly resembling Les- 

 quereux's ^l. 48. f. 4 from the Fort Union Beds ; in the 

 latter, however, some of the upper secondaries run directly 

 to the dentate points of the margin. There is, further, a re- 

 semblance to J^. Nevadensis Lesq., from the Pacific Coast 

 Miocene, which however has the secondaries straighter and 

 subcraspedodrome. 



Considerable similarity is to be noted with various leaves 

 referred to Celastrophyllum, as for instance C. grandifolium 

 Newb., which is common in the Raritan (localities not given) ; 

 our leaf is considerably shorter and relatively wider, more 

 obovate in outline, with a more tapering base, straighter mid- 

 rib and more regular secondaries. 



*F1. Dak. Group. />/. 7./. /. 1S52. 

 t Later Ext. Fl. pi. 20. f. 3. 1S98. 



