MARINE BIOLOGY OF THE SUDANESE RED SEA. 441 
Reports on the MARINE Broxóav of the SUDANESE RED SkA.—IX. Ara. 
By В. J. Harvey Gibgon, M.A., F.L.8., Professor of Botany, University 
of Liverpool. 
[Read 5th December, 1907.] 
[Reprinted from the Journal, Zoology, Vol. хххт. pp. 76-80. | 
THE following notes are the result of an examination of a small collection of 
Marine Algæ made by Mr. Crossland during 1904 and 1905, while engaged 
in investigations on the Sudan Marine Fauna, under the direction of 
Professor W. A. Herdman, F.R.S. Professor Herdman has handed me the 
collection for identification and report. 
The plants were collected chiefly in the neighbourhood of Suakim and 
Trinkitat, and include 35 species, of which 12 belong to the Chlorophyceee, 
12 to the Pheeophycez, and 11 to the Rhodophyceæ. In addition, 4 species 
of marine or brackish-water Phanerogams occur among the Algæ, and are 
given in an Appendix. 
I am greatly indebted to Dr. M. Foslie, of Trondhjem, Dr. Reinhold, of 
Itzehoe, and to Mrs. Gepp for aid in identification of some of the calcareous 
and other forms both among the Rhodophyceæ and Chlorophyces, and also 
to the officials of the Cryptogamie Department of the Natural History 
Museum for aid rendered to me during a brief visit to the Museum for the 
purpose of identifying some of the more critical forms. 
In addition to records of Algee of the Indian Ocean and East Africa 
in more general works such as those of Agardh, Engler, Harvey & Sonder, 
&e., the following papers, dealing more especially with the forms occurring 
in the Red Sea and its immediate vicinity, have been consulted :— 
ZANARDINI: “ Plantarum in Mari Rubro hucusque collectarum enu- 
meratio " (Mem. dell’ I. R. Ist. Veneto, 1858). 
PiccoxE: “ Contribuzioni all’ Algologia Eritrea” (Nuov. Giorn. Bot. 
Ital. 1883). 
Hauck: “ Ueber einige von J. M. Hildebrandt т Rothen Meere und 
in Indischen Ocean gesammelte Algen ” (Hedwigia, 1886-89). 
CHLOROPHYCEJE. 
1. CAULERPA RACEMOSA, J. Ag., var. UVIFERA, J. Ag.: Weber van Bosse, 
Monographie des Caulerpes (Ann, Jard, Buitenz. 1898, p. 362). 
This variety was dredged in 2-3 fathoms off Suez. It is recorded from 
LINN. JOURN.—BOTANY, VOL. XXXVIII. 21 
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