FUCACEAE. 593 



2. Sargassura fluitans (Borg.) Borg. Dansk Bot. Ark. 2-; 66. 1914. 



Sargassum Hystrix fluitans Borg. Mindeskr. for Japetus Steenstrup 32: 

 11. 1914. 



Often associated with 8. natans. New Providence, Rose Island, Great Bahama, 

 Cat Island, and Watling's Island. 



3. Sargassum pteropleuron Grun. Eeise Novara Bot. 1: 55. pi. 5. f. 1. 1867. 



In 1-3 meters of water, often detached and floating. New Providence, Rose 

 Island, Berry Islands, Andros, Joulter's Cay, Great Bahama, Green Cay, Exuma 

 Chain, Watling's Island, Caicos Islands, and Orange Cay : Bermuda and Florida. 

 Type from New Providence. 



4. Sargassum cymosum Ag. Sp. Alg. 1: 20. 1820. 



Sargassum stenophyllum (Mert.) Mart. Ic. PI. Crypt. 8. pi. 5. 1828. 

 Sargassum ramifolium Kiitz. Phyc. Gen. 362. 1843. 

 Sargassum rigidulum Kiitz. Sp. Alg. 615. 1849. 



In shallow water and floating. Great Bahama, Exuma Chain, and Cat Island : 

 Bermuda to Brazil. Type from Brazil. 



5. Sargassum Filipendula Ag. Syst. Alg. 300. 1824. 



Sargassu7)i Mo?itagnei Bail.; Harv. Ner. Bor.-Am. 1: 58. pi. 1A. 1852. 

 Sargassum Filipendula Montagnei Collins & Hervey, Proc. Am. Acad. 53: 

 83. 1917. 



Apparently rare in the Bahamas, its place being taken by S. pteropleuron. 

 New Providence and Orange Cay : Massachusetts and Bermuda to South America. 

 Type from the Gulf of Mexico (?). 



6. Sargassum platycarpum Mont. Sci. Nat. Bot. II. 18: 248. 1842. 



Carpacanthus platy carpus Kiitz. Sp. Alg. 623. 1849. 



In shallow water. New Providence, Berry Islands, Great Bahama, South Cat 

 Cay, and Exuma Chain : Cuba, Jamaica, Porto Rico, and Martinique. Type from 

 Martinique. 



'the most sharply defined species of Sargassum of the West Indian region, rather 

 constant in the form of its leaves and easily identified by its very large elevated 

 cryptostomata in a single series on each side of the costa. 



7. Sargassum lendigerum (L.) Ag. Sp. Alg. 1: 9. 1S20. 



Fucus lendigerus L. Sp. PI. 1160. 1753. 



Near low-water mark. Berry Islands : Bermuda to St. Thomas. Type from 

 Ascension Island. 



8. ? Sargassum vulgare Ag. Sp. Alg. 1: 3. 1820. 



Fucus natans Turn. Hist. Fuc. 1: 99. pi. 46. 1808. Not F. natans L. 



Near low-water mark. Andros, Great Bahama, Abaco, Watling's Island, Atwood 

 Cay, Mariguana, Caicos Islands, Little Inagua, and Castle Island : Supposed to be 

 widely distributed in warm-temperate and tropical seas. Type locality unknown. 



The plants that are now placed provisionally and doubtfully under S. vulgare 

 form a rather homogeneous group and are apparently different in species from the 

 more diversified assemblage here grouped under 8. polyceratium. They differ from 

 Turner's figure a, which seems to have furnished the type idea for 8. vulgare, in 

 their more virgate habit, their somewhat smaller (both shorter and narrower), 

 more sharply serrate and less sinuate-dentate leaves, and their shorter, probably 

 more spinose-dentate receptacles. 



9. Sargassum polyceratium Mont. Ann. Sci. Nat. Bot. IT. 8: 356. 1S37; PI. 



Cell. Cuba 72. pi. 1. 1842. 



Fucus foliosissimus Lamour. Essai 16. pi. 1. f. 1. 1S13. (Xomen nudum 



aut seminudum.) 

 Sargassum leptocarpum Kiitz. Phyc. Gen. 362. 1S43. 



