636 BOTANY. ZOOLOGY. 
desmid floras of the two countries. It is written entirely in Latin. 
Five excellent plates illustrate the paper. 
BOTAN.: 
LEMNA POLYRRHIZA.— While botanizing last week on the Platte 
river in Nebraska, I found, near Fremont, large quantities of Lemna 
polyrrhiza, and upon close inspection to my great joy found many 
specimens in bloom. As this is rarely found in bloom, it may per- _ 
haps be deemed worthy of record. I secured specimens which I 
shall be glad to distribute. I may as well mention also that in the 
same trip I found Euphorbia marquiata in great abundance in 
western and northwestern Iowa, though Prof. Gray puts it as far 
west as the “ plains of Kansas and Nebraska.” —C. E. Bussey, Towa 
State Agricultural Coll. 
New Borantcat Works. — A new part of Bentham and Hooker's 
“Genera Plantarum” is in the printer’s hands, as we learn from 
Trimen’s “Journal of Botany,” and is expected to be out by the 
end of October. It will comprise Rubiacæ, Composite, and the 
intervening orders. 
Mr. M. C. Cook’s new journal “ Grevillea,” devoted to Crypto- 
gamic Botany and its literature, contains much that will interest 3 
American botanists. The August number continues Mr. C. A. F 
Peck’s “New York Fungi,” and announces that a series of papers 
on North American Fungi, by Rey. J. M. Berkeley will be begu 
in the September number. 
We have received the first number of the “ Transactions of p 
Imperial Botanic Garden at St. Petersburg,” an octavo of 1 
pages, printed partly in Russian and partly in Latin. 
ZOOLOGY. ca - 
TORNARIA, THE YOUNG STAGE OF BALANOGLOSSUS- = abil l = 
opment of Tornaria has at last been solved. As 18 i it a stale — 
Müller, Krohn, Fitz Müller and myself have considered Tanai 
fish embryo. The analogy between a Brachiolaria = the jatter ig 
seems complete and no one questioned the position T ornaria t0 : 
till Metznikoff in 1870 was fortunate enough to ti it changed 
a later phase of development — to his astonishm : 
into an annelid. Of course, in view of the affinities 
