22 DESCRIPTIONS OF FOSSIL PLANTS. 



Castanea Ungeri ? Heer. 



Three specimens ; Museum number, 2447. 



Quercus furcinervis (Rossni.) [Jug. 



One specimen ; Museum number, 2554. 

 Quercub lonchitis Ung. 



Three specimens; Museum number, 2557i. 



Quercus fraxinifolia Lx. 



One specimen ; Museum number, 2552. 

 Quercus Olafseni llni. 



One specimen ; Museum number, 2559. 



Quercus platania Heer. 



One specimen ; Museum number, 25G3. 

 Juglans Leconteana Lx. 



One specimen ; Museum number, 24S7. 

 Juglans rhamnoides Lx. 



Two specimens; Museum number, 2483. 



Juglans rugosa Lx. 



Two specimens; Museum number, 2489. 

 Juglans vetusta Heer. 



There is no difference at all, either in the form, the size, or the nervation, 

 between this leaf and that figured in Heer, Fl. Tert., vol. iii, Pi. exxvii i 

 fig. 41, described, p. 90, as leaves petioled, very entire, oblong, obtuse at 

 apex ; secondaries ten to twelve pairs. Heer says that these leaves may 

 represeut a variety of the very variable Juglans acuminata which, under 

 the names of Juglans rugosa Lx., is quite as common in the Laramie 1 

 Group as J. acuminata is in the European Tertiary. The secondaries 

 are very open, nearly at right angles, the reticulation distinct, in large 

 polygonal areoles, formed by subdivisions of intermediate thinner ter< 

 tiaries or nervilles. 



One specimen; Museum number, 2636. 



Juglans denticulata Heer. 



One specimen; Museum number, . 



Phyllites wascoensis, v. sp. Plate XIV, fi£. :*. 



Leaves comparatively large (the lower half of one only is preserved), 

 oval or ovate, cuneiform and abruptly rounded, truncate at base; 

 secondaries oblique, straight in passing toward the borders, parallel, 

 joined by strong nervilles, obliquely directed upwards. 



The leaf, broken 6"" from the base, is at the point of fracture 6 M 

 broad. The fragment has six pairs of secondaries, the three lower com- 

 ing close together toward the base, where they are scarcely 4" mi distant, 

 while above the distance is 1 to l.V 1 ". The distribution of the second- 

 aries and of the nervilles tending upward, finds analogy in some leaves 



