248 NOTICES OF BOOKS. 
sponding to the sahil of the former, and to the Soceed vesinl 
cells of —— while the Pa i ea is a true basidio- 
mycetous fruit, teleutospore being merely pre 
expression of 
adaptation to Scones 1 conditions and producing por basidiospores 
as the result of its germination. 
Dr. Brefeld agrees with Sachs i in considering that the Zygomycetes 
rom A h 
old word Phycomycetes. The rest of the Fungi are divided into two 
groups, Myxomycetes and Mycomycetes, the latter containing Bastdio- 
si, Ustilaginea, Aicidiomycetes and piacere tn Ss. M. 
Movements oF CERATOPHYLLUM. 
M. E. Roprer has been studying (‘Comptes Rendus,” 30th April, — 
Ceratophyllum demersum, and finds that it executes spontaneous and 
regular movements of a very definite character, The stems are usually 
erect, or nearly so, in the water, and it is in the upper part that the 
mo cone occur ; these consist of a regular bending and straightening 
agai mbined with a more or less pronounced torsion. The maximum 
of rad iia is reached in about six hours, the recovery is slower, and in 
_ hours the erect position is regained, flexion in the contrar 
on then occurs and reaches its maximum in about four hours, then 
the cotata entre recurs, and in about another four hours the original 
a 
the ry ep g begins below and terminates at the top. Light 
appeared to exercise no influence on these movements. The torsion- 
movement, which is very evident, is still a subject of ee 
H,.f: 
henge 6 oe of Docks. 
Sean pe E lore von Schlesien. in Horausggebn von Prof. Dr. Ferpt- 
p Cony. Breslau s Verlag. 
Tue two aa hice the first whi of oi Silesian a. 
togam 
Braun, of Berlin. The vascular Cryptogams and Mosses have been 
most carefully and — by Drs. Stenzel and Limpricht, 
bah work is the result of long research in that particular province 
geograp hical distribution 8 of the work on Characee a 
Prof. Braun pre we canuot speak without admira- - 
tion. It saoladect net ae the Characee of Silesia, but those of 
