MARINE BIOLOGY OF THE SUDANESE RED SEA. 305 
Reports on the Marine Bronoav of the SvpaxEsE Rep SEA.—IN. ALGE 
M / 
(Supplement). By R. J. Hanvey-Grtson, M.A., F.L.S., Professor of 
Botany, and MARGERY Kxidfir, D.Se., Assistant-Lecturer in Botany, 
University of Liverpool. 
( With 4 Text-figures.) 
[Read 20th February, 1918.) 
Ix 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 
Algw made by Mr. C. Crossland in the years 1904 and 1905, while making 
investigations on the Marine Fauna of the Sudanese Coast. That collection 
included 35 species equally divided between Chlorophyceze, Phæophyceæ, and 
Rhodophyceæ. In 1910, Mr. Crossland forwarded another small collection 
of Marine Algæ from the same region (chiefly from Khor Dongolab), but 
pressure of other work has prevented any detailed examination of the material 
until the present year (1912). This second collection ineludes 48 species 
(apart from varieties and forms), 36 of which are additions to the previous 
list. Four of these 36 are Cyanophycez, 10 are Chloropliyceze, 8 are Pheeo- 
phyceæ, and 14 are Rhodophycez. 
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 Alge (Chlorophycese and Pheophyces)," and * Marine 
Phanerogams of the * Sealark' Expedition," Trans. Linn. Soc. ser. 2 (Bot.) 
vol. vii. pt. 10; and * The Codiacere of the Siboga Expedition,” Mono. lxii. 
We have also to express our thanks to Mr. Gepp for kindly identifying 
one of the Pheophycee which we had difficulty in determining. 
(Species not present in the previous collection are indicated by an 
asterisk. ) 
CYANOPHYCEM. 
*1, SPHÆROZYGA CARMICHAELI, Harv. 
*9. LYNGBYA SEMIPLENA (Ag.), J. Ag. 
*3. CALOTHRIX PARASITICA (Chauv.), Thur. 
*4. DERMOCARPA PRASINA (Reinsch), Born. 
