36 THE JOURNAL OF BOTANY 
NOTICES OF BOOKS. 
. By F. Boressen. nhagen: Thiel. 1905. 
Pp. 681-834. Reprinted from the Botany of the Faroes, Part 
II. 12 plates, figs. in text. 
The Distribution of the Marine Alga of the Arctic Sea and of the 
Northernmost part of the Atlantic. By F. Bérezsen and Herat 
Jonsson. xxviii pp. Appendix to the Botany of the Feroes. 
Dr. Boreesen’s exhaustive paper on the marine alge of the 
Feroes is the result of six visits paid by him to those islands be- 
d 2 i 
marine vegetation of the Feroe Islands. This knowledge he now 
es in this eminently readable and valuable contribution to 
the Botany of the Faroes. Dr. Bérgesen deals with his subject 
conditions of life are favourable to alge along the shores of the 
pe re for rocks are plentiful and both large and small pools 
abound. 
The title of the second division of the paper, devoted to the 
algee-regions and alge-formations, may sound somewhat obscure. 
The regions are the “ Gebiete” of Kjellman, the Littoral, Sub- 
depth of twenty fathoms, and the Elittoral anything below twenty 
fathoms. The “ Algen-formation” of Kjellman is termed by Dr. 
Bérgesen Alge-association, and indicates a patch of vegetation 
which is distinguished by some special character, being asa rule 
composed of one or, at the most, but few species. These associa- 
tions are often united in a natural way into larger communities, 
