THE AM ERIC AX NA Tl f RA LIST. [Vol. XXXV 1 1 . 



A recent paper by Mr. Lyon, 1 whose work on the embryogeny of 



not come to the notice of Miss Sargent. This paper considers 

 primarily not the origin of the monocotyledons and dicotyledons but 

 the origin of the cotyledon itself. His conclusions are of such 

 interest, and part of them so directly connected with the questions 

 with which Miss Sargent's paper is concerned that it seems well to 

 state them briefly. Of the three elements, cotyledon, stem and root 

 of the typical embryo of the pteridophytes and angiosperms, the 



torial organs, originating phylogenetically as the nursing foot in the 

 Bryophytes and persisting in the higher plants. Thus the monocotyle- 



Monocotyledons is to be regarded as the primitive one while the 

 two or sometimes more cotyledons of the dicotyledons are the 



g g y ^ J.A.Harris. 



French Forestry. 2 — Despite the different conditions under which 

 French and American foresters have to work. Professor Mouillefert's 

 Traite de Sylviculture, the first part of which has just appeared, is well 

 calculated to be of much service even in this country. The remain- 

 ing three volumes of the series are in press and are promised for the 



The bulk of the present volume is devoted to detailed accounts of 

 the principal species both native and foreign with which French for- 

 estry is concerned. Each is described and illustrated by remarkably 



the leaves, inflorescence, flowers, fruit, seeds, germination and wood. 

 Reference is made to the geographical distribution, the tree's prefer- 



and tending. Considerable attention is given to the wood, especially 

 as regards distinctive structural features and economic uses. The 

 uses of other parts is also given, as well as an account of the general 

 economic importance of the tree, exhibited so far as possible by sta- 

 tistics. Finally, its more important insect enemies and vegetable 

 parasites are mentioned and the nature and extent of the injuries they 

 inflict briefly indicated. 



1 Lyon, H. E. The Phytogeny of the Cotyledon, Poslelsia, Vol. i, pp. 57-86, 

 1902. 



2 MouiUefert, P. Principles Essence Forestiires priceedees de notions de statisque 

 forestieres. Paris, Felix Mean. 1903. i2mo, xii + 545 pp., 630 figs. 



