822 The American Naturalist. — [October, 
boundary, to be 3000 feet. This differs considerably from the earlier 
estimates. (Amer. Geol., 1896.) 
Bulletins No. 6 and No. 7, (1895) and No. 8, (1896) of the Illinois 
State Museum of Natural History contain descriptions of new Paleozoic 
Echinodermata, by S. A. Miller and Wm. F. E. Gurley. One new 
family (Thalamocrinide) and five new genera (Sampsonocrinus, Em- 
perocrinus, Shumardocrinus, Thalamocrinus, Indianocrinus) are de- 
fined. In all, 156 species are described and figured. 
Mesozorc.—According to F. H. Knowlton, the fossil flora of Yellow- 
stone Park represents three distinct stages. The first, or older flora, 
from the acid rocks embraces 79 forms; the second, or intermediate 
flora, has 30 species; and the third, or younger flora, comprises 70 
forms. The author refers the first stage division to the Ft. Union or 
lower Eocene; the second is regarded as Miocene, but older than. the 
Auriferous Gravels; and the third is probably of the same age as the 
Auriferous Gravels of California, that is, Upper Miocene. (Amer. 
Journ. Sci., July, 1896.) 
A new fossil plant, Salvinia elliptica, is described and figured by 
Prof. Hollick. The new species is from the Upper Cretaceous of Wash- 
ington State. (Buil. Torrey Botan. Club, Vol. 21, 1894.) 
BOTANY. 
Botany at Buffalo.—In August (21 to 28) there were three 
botanical meetings held in Buffalo, as follows : 
The Botanical Society of America met on Friday and Saturday in the 
High School, with eleven members in attendance. C. H. Peck, of 
Albany, and B. T. Galloway, of Washington, were elected to member- 
ship. The question of the desirability of a winter meeting was discussed 
and referred to the Executive Committee. Appropriate resolutions 
regarding the death of M. S. Bebb, a member, were adopted. The ad- 
dress of the retiring President, William Trelease, on “ Botanical Oppor- 
tunity,” was given in open session on Friday evening. This will be 
printed in full in Science and the Botanical Gazette, and will also be 
distributed in pamphlet form by the Secretary. The following papers 
were accepted for presentation : 
_ The Philosophy of Species-making. - By L. H. Bailey. 
1 Edited by Prof. C. E. Bessey, University of Nebraska, Lincoln, Nebraska, ` 
