(67 ) 
monocotyledonous, probably Araceous spathe from the Da- 
kota Group of Kansas. In all probability Hollick’s specimen 
is of the same species. It is doubtfully a species of Arzsaema, 
however, and might equally be a cycadaceous spathe. In 
appearance the specimen before us is very similar to some of 
Lesquereux’s figures of Dammarites (Fl. Dak. Gr. pl. 7. f 
9-11); the fine lining is about .5 mm. apart as in the existing 
Dammara robusta Moore of Australia, but the texture is very 
thin and quite the opposite of the thick coriaceous leaves of 
Dammara and Dammarites. 
ARISAEMA (7) MartEwanense Hollick. 
Artsaema Mattewanense Holiick, Trans. N. Y. Acad. Sci. 
16: 130. pl. 12. f. 7. 1897 
Provisionally so referred by Dr. Hollick, as the fruit of 
some Araceous plant. 
SALICACEAE. 
Sauix Linn. Sp. Pl. rors. 1753. 
The willows are all extremely rapid growers and thrive in 
the wettest soil; they are thus apt to occur in localities favor- 
able for fossilization. There are about 160 existing species 
widely distributed throughout the northern hemisphere and 
arctic zone, a few in the southern hemisphere; about 80 are 
American. There are about 46 fossil American species dis- 
tributed as follows: Raritan 5, Island Raritan 4, Dakota 11, 
Woodbine 1, Montana 3, Vancouver 2, Laramie 4 (?), Ft. 
Union 1, Green River 5, Eocene 7 (?), Eolignitic 3, Tertiary 
2, Miocene 5, Pleistocene 1 (?). 
Heer records three from the Island of Sachalin and seven 
from the Tertiary of Greenland. 
SALIX PROTEAEFOLIA FLEXUOSA (Newb.) Lesq. Pl. 48. f. 
12; pl. 52. f. 2. 
Salix flexuosa Newb. Ann. Lyc. N.Y. g: 21. 1868; Il. 
Cret. & Tert. Pl. pl. 7. f. g. 1878; Later Ext. Fl. 56. 
DE 20 Fo Dp Pig Sede PETES 7: Te808- 
