ALGM—T>n DICKIE. 397 



2. DICTYOTA. 



Didyota, Lamourx. in Ann. Mus. Par. xx. (1813), 271 pro parte ; J, Gr. Ag. Sp. Alg. i. 86 ; Ktz. 

 Tab. Phyc. ix. 



A genus of several variable species found in all seas. 



1. D. dichotoma, Lamourx. in Ann. Mus. Par. xx. (1813), 273 ; Harv. 

 Phyc. Brit. t. 103 ; Ktz. Tab. Phyc. ix., t. 10, f. 1. 



Socotra. 



Distrib. Round the whole world in warmer regions. 



var. intricata, Grev. Alg. Brit. 58. 



D. implexa, Lamourx. loc. cit. 273 ; Ktz. Tab. Phyc. ix., t. 14, f. 1 ; Delile Flor. Egypt. 147, t. 



56, f. 2. 

 D. dichotoma, var. implexa, J. G. Ag. Sp. Alg. i. 92. 



Socotra. 



Distrib. Mediterranean and Red Seas, Atlantic and Pacific Oceans. 



2. D. acuminata, Ktz. Sp. Alg. 555, and Tab. Phyc. ix. 7, t. 15, f. 3. 



Socotra. 



Distrib. Red Sea, Ceylon. 



3. ASPEROCOCCUS. 



Asperococcus, Lamourx. in Ann. Mus. Par. xx. (1813), 277 ; J. G-. Ag. Sp. Alg. i. 74. 



A small genus including a dozen or more species widely dispersed over the 

 globe. 



1. A. sinuosus, Bory. Exp. Moree iii. 326 ; J. G. Ag. Sp. Alg. i. 75. 



Encmlium sinuosum, Ag. Syst. Alg. 262 ; Ktz. Tab. Phyc. ix. t. 8, f. 1. 



Socotra. 



Distrib. Warmer regions all round the world. 



2. A. intricatus, J. G. Ag. Alg. Liebm. 7, ex eod. Sp. Alg. i. 77. 



Socotra. 



Distrib. Vera Cruz, Fernando Noronha, Mauritius. 



