MARINE BIOLOGY OF THE SUDANESE RED SEA. AOL 
Reports on the Marine Bronoey of the SupANESE Rep Sra.—XX. ALGH 
(Supplement). By R. J. Harnvey-Gresoy, M.A., F.L.S., Professor of 
Botany, and Margery Kyigut, B.Sc., Assistant-Lecturer in Botany, 
University of Liverpool. 
(With 4 Text-figures.) 
[Read 20th February, 1913.] 
(Reprinted from Journ. Linn. Soc., Bot. xli. (1918) pp. 805-309.) 
In the present volume (vol. xxxi.) of the Society’s Journal (Zoology), 
pp. 76-80 (1908), and reprinted in Vol. xxxviii. (1909), Botany, pp. 441- 
445, a brief account was given by one of us (R. J. H.-G.) of a small 
collection of Marine Algz made by Mr. C. Crossland in the years 1904 and 
1905, while making investigations on the Marine Fauna of the Sudanese 
Joast. That collection included 35 species equally divided between Chloro- 
phyceze, Pheeophycez, and Rhodophycee. In 1910, Mr. Crossland forwarded 
another small collection of Marine Algze from the same region (chiefly from 
Khor Dongonab), but pressure of other work has prevented any detailed 
examination of the material until the present year (1912). This second 
collection includes 48 species (apart from varieties and forms), 36 of which 
are additions to the previous list. Four of these 36 are Cyanophyceee, 
10 are Chlorophycez, 8 are Pheeophycez, and 14 are Rhodophycee. 
The chief memoirs consulted have already been recorded in the paper 
above mentioned, and need not be repeated here ; but we have had occasion to 
refer also to two important monographs by Mr. A. Gepp and Mrs. E.S. Gepp, 
viz. :—‘“* Marine Algze (Chlorophyceze and Phzeophycez),” and ‘Marine 
Phanerogams of the ‘ Sealark’ Expedition,” Trans. Linn. Soc. ser. 2 (Bot.), 
_yol. vii. pt. 10; and “ The Codiaceze of the Siboga Expedition,” Mono. Ixii. 
We have also to express our thanks to Mr. Gepp for kindly identifying 
one of the Pheeophyceze which we had difficulty in determining. 
(Species not present in the previous collection are indicated by an 
asterisk. ) 
CYANOPHYCEA. 
*1, SpH#ROZYGA CARMICHAELI, Harv. 
*2. LiyNGBYA SEMIPLENA (Ag.), J. Ag. 
*3. CALOTHRIX PARASITICA (Chawv.), Thur. 
*4. DERMOCARPA PRASINA (Lesch), Born. 
ZOOLOGY, VOL. XXXI. 32 
LINN. JOURN. 
