ELEMENTS DE PALEOBOTANIQUE 447 
matter serving to elucidate both structure and functions, and to 
emphasize that close relation between the two which cannot be 
too much insisted upon. | : 
e author has also endeavoured to impress upon the student 
the points of resemblance between animal and plant life resulting 
from the identity of all living substance. While, for instance, it 
has long been recognized that respiration in plants and animals 
he sa ivi 
h 
the nutrition of protoplasm generally, and the raw food materials 
ich the green plant can absorb from without under certain 
e 
saprophyte, is on precisely the same lines, the foods being sub- 
stances of a complex nature, mainly proteids, carbohydrates, fats, 
or oils, In chapter xi. an excellent account is given of the work 
of the chlorophyll apparatus and the first visible products of its 
operations. 2 
There are in all twenty-seven chapters. The earlier deal with 
d 
expenditure of energy, and the relation of the plant to its environ- 
ment as expressed by general form and response to external 
roduction. 
The book is well written and very fairly illustrated; many of 
the figures seem to be original. It is very heavy for its size, but 
the widely ranging specific gravity of paper is a mystery into which 
we cannot enter here. Professor Green is to be congra 
having made a valuable addition to the teaching literature of botany. 
A. B. R. 
Eléments de Paléobotanique. Par R. ZErnuer. Paris: Carre et Naud. 
1900. Pp. 421. 
Studies in Fossil Botany. By Doxiwrmetp Henry Scort, Ph.D., 
-R.S., &e. aia oie & C. Black. 1900. Pp. 533. 
Price 7s. 6d. 
M. Zerier has rendered an important service to Paleobotany 
by this valuable introduction. It presents a systematic view of the 
various types of plants which have been discovered in a fossil 
state. Prefixed to this view are two chapters, one on the various 
