14 
can convey so correct an idea of a form as a view of the plant 
itself. 
The third number of Cooke's British Fresh- Water Algae has ap- 
peared. 
N. Wille, of Norway, has published a good paper (in Norwegian) 
on the transitions and developing forms of the Confervacese. 
M. Ed. Bornet, of Paris, has published a valuable article (in 
French) on Mazcsa^ a new genus of algse of the order Crytophycees. 
Dr. J. Rostafinski, of Cracow, has published a monograph (in 
Polish) on Hydrurus and its connections. 
Prof. G. Lagerheim has made a contribution (in Swedish) to the 
knowledge of several orders of algae in the vicinity of Stockholm. 
Dr. Paul Richter, of Germany, has put forth a paper (in German) 
on the question, '' Is Sphcerozyga Jacobi^ Ag., a synonym for Mastigo- 
cladus luminosus^ Ktz." 
The latest from Prof. A. Borzi, of the University of Messina, 
Sicily, is the third part of his valuable contributions (Italian) on the 
Morphology and Biology of the Phycochromacese. 
For a work on the American fresh-water algae, I fear the time is 
not yet ripe to heed the solicitations of friends. It is true, I have 
added over seven hundred new names to the list of the flora of the 
United States, but, so long as each returning summer brings an addi- 
tion of fifty or more new varieties, it would seem well to defer it. 
(EDOGONIUM, Link.— ffi^/. Boscii, Witt. Collected by R. Hitch- 
cock in a pond at Weehawken, N. J. CEd. Tyrolicum^ Witt. In a 
pond, Pennsylvania. (Ed, crasstusculu??i, Witt. Pennsylvania and 
New Jersey. (Ed. obsoletum^ Witt. Pennsylvania. (Ed, concatcna- 
turn (Hass.) Witt. Plainfield, N. J., collected by A. D. Balen; also 
near Bethlehem, Pa. (Ed, Landsboronghi (Hass.) Witt. Elmira, N. 
Y. (Ed. princeps (Hass.) Witt. Minneapolis, Minn. 
BULBOCHyETE, Ag,—B, Monili, Witt. & Lund. Collected by 
A. C. Stokes, Trenton, N. J. 
GONATOZYGON, D. By.— 6^. asperum, Ralfs. Ponds, Eastern 
Pennsylvania. 
VAUCHERIA, DC— r. tuberosa^ A. Br. Collected by Prof. S. 
A, Forbes, of the State Laboratory of Natural History, Normal, III. 
The plant was dredged from Lake Michigan, four miles from 
Chicago, from a depth of 36 feet. This form was first described by 
the late A, Braun, of Berlin, from specimens found in deep waters, 
and also in marshy places on the continent of Europe. I have an- 
other form, collected by Capt. J. D, Smith in a marsh in Georgia in 
1878. The filaments are less than half the size and devoid of the tuber- 
like stolons; and it is three to five times as dichotomousas the typical 
form. I will call this var. intermedia, 71, var. A third form, var. deli- 
CATissiMA, n. var., is found on wet planks here, and, during the past 
summer, occurred in a small pool on the banks of the Susquehanna 
River, Harrisburg, Pa. The filaments are very thin and measure only 
10/^-12/^, The branching is not so frequent, but the constrictions at 
the base of the branches, and interstitially, are the same. Dr. 
Rabenhorst questioned the propriety of classifying the typical form, 
the only one known to him, as a Vaiicheria. It is very unlike all other 
