Geology and Natural History. 157 
part of the book. There are so many points which it were well to 
call attention to, or sometimes to comment upon, for which space 
is now wanting, that we must defer the remainder of this critical 
notice to the next issue of the Journal. 
t is to be regretted that, for the completeness of this work the 
author did not comprehend in it the subject of nomenclature of 
groups—an important part of phytography—and reprint in it his 
opuscula, entitled Lois de la Nomenclature Botanique, along 
with some further commentaries, such as his experience and some 
adverse criticisms from an opposing school may have suggested. 
This may still be desired, although the little treatise has already 
been widely disseminated in three languages, and although, as the 
author incidentally remarks, his own view is shared by an immense 
majority of descriptive botanists. A. G, 
: of North America: Colored Figures and De- 
scriptions with Synonymy and Geographical Distribution, ete.; 
by Dantet Capny Eaton, Professor of Botany in Yale College, 
1879, 1880. 71 plates. Published by 8. E. Cassino, 299 Wash- 
ington street, Boston.—From time to time we have noticed this 
i , and have now only to congratulate author, 
artists, and publisher, also the botanical public and the nu- 
merous amateur fern-people, upon its happy completion. The 
nostic characters, a most convenient and useful addition. Woul 
that our other Cryptogamia, or any of them, were similarly pro- 
vided for. A. G. 
6. Index perfectus ad Caroli Linnwi Species Planta 
nd true way is to begin at the beginning; and it sometimes hap- 
pens that the accretions in the subsequent edition are misleading. 
A. G 
7. Catalogue of North American Musci; arranged by 
Evernr A, Rav and A. B. Hervey. Taunton, 1879. 
1880.—The species are arranged after Schimper’s Synopsis; gen- 
