No. 397.] REVIEWS OF RECENT LITERATURE. 79 
of five years the viability of some of them has been tested. After 
twenty years in the soil, nine species, all common weeds, germi- 
nated, the percentage varying from 2 to 58, while thirteen species 
failed to grow, — as appears from a note in the September number 
|. of the Journal of the Columbus Horticultural Society. 
From a recent article in Gartenfiora it appears.that at the great 
St. Petersburg botanical garden 24,176 species and varieties of 
plants are cultivated, the herbarium contains over a million and a 
half specimens, and the library consists of 14,040 works, bound in 
27,588 volumes. 
PALEONTOLOGY. 
The Later Extinct Floras of North America.' — In the preface 
Dr. Hollick explains the conditions under which this posthumous 
work of Professor Newberry's was prepared for the press. An 
edition of twenty-five plates was issued without text in 1878, under 
the title, ZZ/ustrations of Cretaceous and Tertiary Plants of the Western 
Territories of the United States. Subsequently a revised edition of 
these, with forty-three additional plates, was printed, but not dis- 
tributed, being withheld for the completion of the text. Professor 
Newberry's death stopped further progress on the work. Two sets 
of the plates bore manuscript names. From these plates, Professor 
Newberry's manuscript, the labels on type specimens, and Professor 
Newberry's previous publications, the present text was compiled. 
This was evidently a laborious undertaking carefully carried out, 
as evinced by the text and occasional editorial notes. 
One hundred and seventy-four species are figured and are described 
in the text, with the exception of some species of which the editor 
found no manuscript or other descriptions by Professor Newberry. 
The plates are beautifully executed. The species described are all 
from the Cretaceous and Tertiary formations, and are from the 
Western States and Territories, excepting Seguoia gracillima, de- 
Scribed as also from New Jersey, and Salix membranacea, described 
from New Jersey only. Six new species are described, namely, 42ie- 
lites cretacea, Sabal grandifolia, Myrica (?) trifoliata, Salix foliosa, 
1 Newberry, John Strong. The Later Extinct Floras of North America, a 
posthumous work, edited by Arthur Hollick. Monograph of the U. S. Geological 
Survey, vol. xxxv, pp. i-xvii, 1-295, Pls. I-LXVIII. Washington, 1898. 
