ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
757 
Lysurus.* — M. N. Patouillard points out that in this genus of 
Plialloidem two distinct types have been included, one having the basids 
on the outer, the other on the inner surface of the lobes of the receptacle. 
He classifies the genera of Phalloideae as follows : — I. Phalleze, glebe 
covering the outer surfaco of the receptacle (Mitrese, Capitreae, Lysureee, 
Kalckbrennereae) ; II. Clathre^, glebe covering the inner surface of 
the receptacle (Conjugege, Anthureae). 
Eabenhorst’s Cryptogamic Flora of Germany (Fungi.) — The last 
three parts (31-33) of the section of this work devoted to Fungi, now 
edited by Dr. H. Eehm, are still occupied by the Pezizaceae. The 
suborder Dermateaceas (including the Cenangieae, Dermateae, Patella- 
riaceae, and Bulgariaeeae) occupies their greater portion, the section 
Calicieae being just commenced. A number of new species and several 
new genera are described. 
Protophyta. 
a. Schizophyceae. 
Pure Culture of Green Protophyta.j — Herr M. W. Beyerinck has 
succeeded, though with great difficulty, in raising pure cultures of 
Chlorococcum protogenitum and Haphidium naviculare , free from the 
countless bacteria which infest stagnant water. 
The Haphidium was found to throw off an enzyme which slowly 
deliquesces gelatin. 
The Chlorococcum presents characters identical with the Zoochlo- 
rellae of the lower freshwater animal organisms, such as Hydra , Para- 
mecium, , &c. The modes of increase are precisely the same in both, and 
are twofold, viz. : — (1) Occasionally, in large cells under favourable 
conditions, division takes place by constriction, as in chlorophyll-grains. 
(2) After the lens-shaped chlorophyll-bodies have divided into 2, 4, or 
8 sections, the membrane of the mother-cell is thrown off. The eight 
(or fewer) free protoplasts round themselves off, containing each a lens- 
shaped chlorophyll-body, and grow to the normal size. In other 
morphological characters, such as the presence of a nucleus, and the 
form of the amylaceous body in the chromatophores, Chlorococcum and 
the Zoochlorellse agree altogether. 
The author describes in detail processes by which he was able to 
demonstrate that the living green cells can decompose carbon dioxide in 
a medium containing no oxygen, and can be supplied with free oxygen 
by means of a Schizomycete, Mycoderma Sphseromyces. 
Coscinodiscus.J — Mr. J. Battray continues his monographs of genera 
of diatoms with a revision of the genus Coscinodiscus and of some allied 
genera. Of Coscinodiscus he describes about 290 species, some of them 
new. The other genera included in the monograph are : — Actinogonium 
(2 species), Brightwellia (6 species), Stelladiscus gen. n. (1 species), 
* Journ. de Bot. (Morot), iv. (1890) pp. 253-8 (5 figs.). 
f Aanteek. Utrechtach Genoots. Kunst. en Wetensch., 1889, pp. 35-52. See 
Bot. Centralbl., xliii. (1890) p. 142. 
x Proc. Roy. Soc. Edinb., xvi. (1888-9) 1890, pp. 449-692 (3 pis.). Cf. this 
Journal, 1888, p. 861. 
