166 THE JOURNAL OF BOTANY 
salient principle, that fluctuations are linear, ete limited to an 
increase and to a decrease of characters; an at these changes 
are Aumont due to differences of nourishment, dines of the whole 
or in par 
n the final lecture the author discusses artificial and natural 
selection in their bearing on Fluctuations, but does not refer to the 
important topics of the in adequacy of natural aromas n and the 
inheritance of acquired characters, dealt with fro dukieine sree 
points Mts Mr. Herbert Spencer and Prof. ‘Weisman nn. The rea 
sing Swords, while o age cel smaller page if Darwin, p. 210, there 
” Thi is “not possible within the brief space allotted to this review to 
do justice to the admirable exposition of the theory therein contained, 
and of the theories ancillary to it which are lightly touched upon by 
ae author. His views are stated with consummate ability and with 
usual clearness, which only serve to bring into relief certain 
detail in which he runs counter to the general consensus of a wih 
Fetes 7 Wituiams. 
Liste des Algues Marines observées jusqu’a ce jour entre l'embouchure de 
V’Escaut et ia Corogne (incl. tles Anglo-Normandes), Par J 
Haton. Anvers: Buschmann. 1905. Price 6 francs. 
Tas list eee nts the marine algal flora of Belgium, North 
and West France, and North Spain. The author describes the 
sources from which he has derived his facts and information. 
ese comprise his own collections at some seven different localities, 
contributions from other collectors, the herbaria at Caen, Brussels, 
Antwerp, &c., the local floras and other litetatare, the manuscript 
of Van Heurck’s forthcoming Prodromus of the marine flora of 
