FOSSIL PLANTS 
*55 
Spitzbergen referred by Heer to Ulmus braunii , l but it seems impos¬ 
sible that they should belong to this genus. They do not altogether 
agree with Corylus , yet seem perhaps closer to this than to any other. 
For the present they may remain under this name. 
Alnus corylifolia Lesq. 
Alnus corylifolia Lesq. , Proc. U. S. Nat. Mus., vol. v, p. 446, pi. vii, figs. 
i-4» 1882. 
The collection contains several perfect and beautifully preserved 
leaves, as well as a number of broken examples, that appear to belong 
to this species. They are of about the same size as the leaves in figs. 
2 and 3 (loc. cit.) ; they have rather finer teeth, but otherwise do not 
differ essentially. 
Alnus sp. 
pi. xxviii, fig. 2 ; pi. xxxni, fig. 4. 
The collection contains two specimens that appear to represent the 
female catkins of an alder. They are well shown in the figures. 
Family ULMACEiE 
Ulmus braunii Heer. 
Ulmus braunii Heer, FI. Tert. Helv., vol. n, p. 59, pi. lxxix, figs. 14-21, 
1856. —Lesquereux, Cret. & Tert. FI., p. 161, pi. xxvii, figs. 1-4, 1883. 
1 have some doubt as to the correctness of referring these leaves to 
Ulmus, but the examples in hand are not to be distinguished from cer¬ 
tain specimens from Spitzbergen and other localities that have been so 
referred by Heer, 2 and I have thus regarded them. 
4 
Family ACERACEiB 
Acer trilobatum var. 
Pi. XXIX, fig. 2. 
The collection contains several broken leaves of a maple, one of the 
best being figured. This appears to be one of the forms of the varia¬ 
ble A. trilobatum. It lacks the upper portion, and its position, there¬ 
fore, can not be definitely fixed. 
Family HIPPOCASTANACE^ ; 
JEsculus arctica sp. nov. 
pi. xxx. 
Leaflets of large size, coriaceous, obovate-lanceolate, rather abruptly 
rounded to an obtusely acuminate apex; margin entire below, finely 
1 F 1 . Foss. Arct., vol. iv, Abth. 1, pi. xvi, figs. 5-8, 1876. 
2 FI. Foss. Arct., vol. iv, Abth. 1, p. 75, pi. xvi, figs. 3, 4, 1876. 
