130 General Notes. { February, 
Murray’s experiments undertaken to determine the method of the 
diffusion of the conidia of the potato disease (Peronospora infes- 
tans). Microscopic slides coated with glycerine were exposed on 
the lee side of an infested potato field, and carefully examined at 
intervals of from ten to twelve hours, z. ¢., at gq A. M. and 7 P.M 
No conidia were caught during the night, but upon the twenty- 
eight square inches of surface exposed during the day, there were 
caught in the first day 15 conidia; in the second, 17; in the third, 
27; in the fourth, 4; in the fifth,9. Considering the small amount 
of surface exposed by the slides, and the fact that only about two 
per cent. of the potato plants in the field were diseased, the num- 
ber of conidia caught is very large-—— Henry M. Douglas, of 
South Richland, N. Y., has undertaken to translate the successive 
numbers of the Botanische Zeitung, as they appear. ueen & 
Co., of Philadelphia, have prepared a series of twenty-four slides 
of microscopical specimens illustrating many points in the histol- 
ogy of the higher plants. They are neatly mounted and will be 
useful to many teachers and students. The American Monthlp 
Microscopical Fournat has, during the past year, contained many 
valuable botanical articles; among these may be mentioned sev- 
eral Notes on Fresh-water Algz, Double-staining of Vegetable 
Tissues, The Salmon Disease and its Cause, besides many upon 
Diatoms. The microscope is now indispensable to the botanist, 
and it is encouraging to find that microscopical journals are begin- 
ning to make themselves useful to him also. Science has now a 
botanical department. W. P. Schimper’s herbarium (of mosses) 
has been purchased by the Kew Herbarium. In Nos, 46—50. 
of Botanische Zeitung, Goebel publishes an interesting paper on the 
Morphology and Physiology of Leaves, accompanied by a plate 
with many figures. In No. 50 of the same journal Strasbur- 
ger’s paper on cells with several nuclei, and some points in the 
embryogeny of Lupinus, promises to be of considerable value. 
nounced, Of the first volume (Fungi), the first part is now ready. 
ZOOLOGY. 
DESCRIPTION OF A HERMAPHRODITIC PHYLLOPOD CRUSTACEAN 
(EuBRANCHIPUS).—The single specimen of Eubranchipus vernalis 
here described was found in January, 1880, in a small, isolated 
pool, near Maspeth, L. I, living in company with a great number 
of a pale, transparent race of Audranchipus vernalis Verrill. The 
hermaphrodite belonged to form A, as already pointed out in 4 
paper read before the American Association for the Advancement - 
of Science, in August, 1880. | 
Owing to my often taking it out for closer inspection, it died 
after having been kept in the aquariam for three days. 
Genital Organs——The female side consisted exteriorly of two. 
. new and thoroughly revised edition of Rabenhorst’s - 
- Cryptogamic Flora of Germany, Austria and Switzerland is an- — 
