188o. | Botany. 589 
West Tennessee: its Resources and Advantages, By J. B. Killebrew. 8vo, pp. 
93, 1880. From the author. 
On the Physical Structure and Hypsometry of the Catskill Mountain region. By 
Arnold Guyot. (From Amer. Jour. Sci., Vol. xix, June, 1380.) 8vo, pp. 22, maps 
. From the author. 
Geological and Natural History Survey of North Carolina. Part 11—Botany. By 
M. A. Curtis. 8vo, pp. 156, 1867. 
The Felsites and their Associated Rocks north of Boston, (From Proc. Boston 
Soc. Nat. Hist., Vol. xx, Jan. 21, 1880.) By J. S. Diller. 8vo, pp. 12,1880, From 
the author, 
Proceedings of the Academy of Natural Sciences of Philadelphia. 8vo, pp- 152, 
I0 pls. Pt, 1, 1880. From the academy. 
Catalogue of North American Musci, Arranged by Eugene A, Rau and A. B. 
Hervey. 8vo, pp. 52, 1880. . From the authors. 
Korte Bidrag til nordisk Ichthyographi. 111 Gronlands og Islands Lycoder. Med 
Bemærkninger om andre nordiske Arter. (Aftryk af Vidensk. Meddel. fra den 
naturhist. Foren. i Kbhvn. 1879-1880.) By Dr. Chr. Lütken. 8vo, pp. 26, 1880. 
e author. 
Le Globe Lenox de 1511, Traduit de anglais par Gabriel Gravier. 8vo, pp. 26, 
1880. From the author, 
Découverte d’un Squelette entier de Rytiodus dans le Falun Aquitanien, (Ext. 
des Actes de la Société Linnéenne de Bordeaux.) Par M. E. Delfortrie. 4to, pp. 
16, pls. 4, 1880. From the author, 
The Orthonectida, a new class of the Phylum of the Worms. (From Quart. 
Journ. Micros, Sci.) By Alfred Giard. 8vo, pp. 15, pl. 1, 1880. From the author, 
Zur Anatomie und Physiologie des Nervensystems der Nemertinen, Von A. A. 
W. Hubrecht. 4to, pp. 47, pls. 4, 1880. From the author. ' 
:0! 
-GENERAL NOTES. 
BOTANY. 
CHANGES IN PLANT .LIFE ON THE SAN FRANCISCO PENINSULA! — 
gressively prepare themselves in our surroundings, e have no 
room in our journals for facts of every-day occurrence, and at the 
strata the remainders of different forest trees ; and in the Atlantic 
States many acute observers have noticed that the birch gradually 
‘Supersedes the conifers, : ; = 
uch a process of change, of course, is accelerated if to the 
secular process of change is added the powerful agent of human 
Th following ess ay, which will be of interest to all botanists and observers or 
plant growth generally, was read at the meeting of the Academy of Sefences, Feb. 
by Dr. Herman Behr, of San Francisco, and appeared in the Aural Press. 
