170 THE FRESH-WATER ALGAE OF ESSEX.
logical Phenomena. Chairman.—Mr. G. J. Symons. Secretary.—Mr. A. W.
Clayden. Professor R. Meldola, and Mr. John Hopkinson.
To consider the best Methods for the Registration of all Type
Specimens of Fossils in the British Isles, and to report on the same.
Chairman.—Dr. H. Woodward. Secretary.—Mr. A. Smith Woodward. Rev. G.
F. Whidborne, Mr. R. Kidston, and Mr. J. E. Marr.
THE FRESH-WATER ALGAE OF ESSEX;
A PRELIMINARY LIST OF RECORDED SPECIES.
By M. C. COOKE, M.A., LL.D., A.L.S., &c.
[Read November 4th, 1893.]
[The following list of the species of Fresh-water Algae (excluding
the Diatomaceae) hitherto recorded for Essex, has been kindly
compiled by Dr. Cooke for the purpose of establishing a starting-
point for future recorders, in the hope that botanists will speedily
add new species to the catalogue. The few short lists published in
our "Journal of Proceedings" have been collated and incorporated,
as well as the Algae recorded by the late Mr. E. G. Varenne in The
Essex Naturalist (vol. v., pp. 25-30). In the list the initials,
following the localities, are indications of the authority for the
record, thus :—
A.H.H. Dr. A. H. Hassall, author of "Fresh-Water
Algae."
E.G. V. The late Mr. E. G. Varenne, of Kelvedon.
Q.M.C. Excursion lists of Quekett Microscopical Club
in the "Journal" of the Club.
G.E.M. Mr. G. E. Mainland.
The references to figures of the various species are made to
Cooke's "British Fresh-Water Algae," and Cooke's "British
Desmids," with coloured plates, in which two works all the species
are figured. The number of species here recorded is 170 with
15 "varieties."
The Diatomaceae have been wholly excluded, and require special
investigation.]
PALMELLACEAE.
Pleurococcus vulgaris, Men. Cooke, t. 2, f. 1. On trunks,
Epping; Kelvedon (E.G.V.).
Palmella hyalina, Breb. Cooke, t. 5, f. 3. In bogs, etc.,
Kelvedon (E.G.V.)
P. mooreana, Harv. Cooke, t. 5, f. 4. In bogs, etc., Kelve-
don (E.G.V.).
Porphyridium cruentum, Nag. Cooke, t. 5, f. 6. On
walls, etc., Kelvedon (E.G.V.)