WELWITSCH's AFRICAN MARINE ALG^E. 371 



6. Halimeda Lam. in Nouv. Bull. Soc. Philom. Nov. 1812, 186. 



1. H. Tuna Lam. St. Vincent, Cape de Verde : rare on basaltic 

 shore ; Aug. 1853. No. 247. 



Geoyr. Distr. North Atlantic, Mediterranean, West Indies. 



Ph^ophyce^. 

 1. Cystoseira kg. Sp. i. 50. 

 1. C. Abies-marina Ag. St. Vincent, Cape de Verde: rather 

 frequent and well-developed on volcanic rocks near Praia de Gal^ ; 

 20 Aug. 1853. No. 221. 



Geogr. Distr. North Atlantic, Mediterranean. 



2. Padina Adans. Fam. des Plantes, pt. ii. 13. 



1. P. Pavonia Lam. Loanda : on rocks close to the shore of 

 the ocean near S. Pedro, frequent; Feb. and July, 1854. No. 40. 

 St. Vincent, Cape de Verde : thrown up near Praia de Gal^ ; Sept. 

 1853. No. 210. 



Geogr. Distr. General in temperate and warm oceans. 



3. DicTYOTA Lam. in Desv. Journ. Bot. ii. 38. 



1. D. DicHOTOMA Lam. Prince's Island : on rocks of the ocean, 

 not infrequent, close to the shore. Bahia de St. Antonio ; 20 Sept. 

 1853. No. 258. 



Geogr. Distr. Warm and temperate oceans. 



4. Hydroclathrus Bory in Diet. Class, viii. 1825, 419. 



1. H. cancellatus Bory. Loanda : thrown up by the Atlantic 

 at Praia de Gamba, frequent ; 4 Dec. 1853 ; 3 Feb. 1854. No. 45. 



Geogr. Distr. Warm Atlantic, North and South Pacific, Indian 

 Ocean, Australia. 



5. Colpomenia Derb. & Sol. M^m. Phys. Alg. 11. 



1. C. sinuosa Derb. & Sol. Loanda : thrown up by the ocean near 

 S. Pedro, very rare. No. 44. Madeira : Funchal, 1852. No. 265. 



Geogr. Distr. Warm Atlantic, North and South Pacific, Indian 

 Ocean, Mediterranean and Adriatic, Australia. 



FlORIDEjE. 



1. Galaxaura Lam. Polyp. Flex. 259. 



1, G. fragilis Dene. Very frequent on the shores of St. Vin- 

 cent, Cape de Verde, thrown up by the sea in great abundance. 

 Island of St. Vincent, Cape de Verde : on volcanic rocks near Praia 

 de Gal6, especially frequent ; 21 Aug. 1853. No. 220. 



Geogr. Distr. In warm and tropical seas. 



2. G. OBTUSATA J. Ag. Loanda, 1854. No. 275. 

 Geogr. Distr. Warm Atlantic, Cape of Good Hope. 



2. Caulacanthus Kiitz. Phyc. Gen. 395. 

 1. C. usTULATUs Kiltz. Mossamodcs : vory frequent on calcareous 

 rocks of the sea near Mossamedes ; July, 1859. No. 76. Frequent 



2 B 2 



