CERAMTACEAE. 583 



5. Ceramium byssoideum Harv. Ner. Bor.-Am. 2: 218. 1853. 



Ceramium transversale Collins & Hervey. Proc. Am. Acad. 53: 145. pi. 5. 

 f. 29-31. 1917. 



On various algae, leaves of Cymodocea, roots of Rhizophora, etc., near the low- 

 water mark, Berry Islands, North Cat Cay, Exuma Chain, and Mariguana : Bermuda 

 and Florida to the American Virgin Islands. Type from Key West, Florida. 



6. Ceramium corniculatum Mont. Ann. Sei. Nat. Bot. IV. 14: 172. I860. 



Gongroceras corniculatum Kiitz. Tab. Phyc. 12: 25. pi. 81. f. e-g. 1S62. 



Under shelving rocks, on roots of Rhizophora, etc., near low-water mark, Rose 

 Island, Bimini, Mariguana, and Caicos Islands : Florida to Guadeloupe and Mar- 

 tinique. Type from Guadeloupe. 



12. CERAMOTHAMNION Richards, Bull. Torrey Club 28 : 



257, 264. 1901. 



1. Ceramothamnion Codii Richards, loe. cit. pi. 21, 22. 



On Codium intertcxtum, Atwood Cay : Bermuda to Barbados. Type from Ber- 

 muda. 



13. CENTROCERAS Kiitz. Linnaea 15: 731, 741. 1842. 

 1. Centroceras clavulatum (Ag.) Mont, in Durieu, Fl. Algerie 1: 140. 1846. 



Ceramium clavulatum Ag. in Kuntli, Syn. PI. Aeq. 1: 2. 1822. 

 Centroceras cryptacantlium Kiitz. loc. cit. 741; Tab. Phyc. 13: pi. 17. f. 



a-d. 1863. 



Centroceras micrantliemum Kiitz. loc. cit. 741; Tab. Phyc. 13: pi. 18. f. a-d. 

 Centroceras liyalacantlium Kiitz. loc. cit. 742; Tab. Phyc. 13: pi. 19. f. d-f. 

 Centroceras oxyacantlium Kiitz. loc. cit. 742; Tab. Phye. 13: 2^. 20. f. a-c. 

 Centroceras brachyacanthum Kiitz. Tab. Phyc. 13: 8, pi. 20. f. d-f. 



On rocks and on various algae, low-littoral ami in shallow water ; very common 

 and variable. Most of the Bahamian specimens accord with Kiitzing's C. hyalacanthum 

 and C. oxyacanthum ; a few agree with his C. cryptacanthum (type form of C. clavu- 

 latum), C. micracantlium, and C. brachyaoanthum. New Providence, Rose Island, 

 Berry Islands, Great Bahama, Bimini, North Cat Cay, Abaco, Eleuthera, Cat Island, 

 Exuma Chain, Watling's Island, Mariguana, Caicos Islands, Great Ragged Island, and 

 Orange Cay : Bermuda and Florida to South America ; widely distributed in the 

 warmer seas. Type from Callao, Peru. 



Family 13. DUMONTIACEAE. 

 1. DUDRESNAYA Bonnem. Jour. Phys. 94: ISO. 1822 (not seen). 



1. Dudresnaya bermudensis Setchell, Univ. California Publ. Bot. 4: 244. pi. 



27. 1912. 

 Washed ashore, Great Bahama : Bermuda. Type from Bermuda. 



Family 14. RHIZOPHYLLIDACEAE. 



1. OCHTODES J. Ag. Act. Univ. Lund. 8: 5. 1872. 



1. Ochtodes secundiramea (Mont.) M. A. Howe, comb. nov. 



Eypnea ? secundiramea Mont. Ann. Sci. Nat. Bot. II. 18: 255. 1842. 

 Chondrococcus filiformis Kiitz. Sp. Alg. 752. 1849; Tab. Phyc. 17: 28. pi. 



95. f. c, d, e. 1867. 



Sphaerococcus filiformis J. Ag. Sp. Alg. 2: 644. 1852. 

 Ochtodes filiformis J. Ag. Act. Univ. Lund. 8: 5. 1872. 

 Acantlwcoccus adelphinus Mont.; Crouan in Maze & Schramm, Alg. Quad. 

 189. 1870-1877. 



Near low-water mark, commonly iridescent, Cave Cays, Exuma Chain : Cuba ; 

 Jamaica; Porto Rico; Martinique; and Barbados. Type from Martinique (in herb. 

 Mus. Paris.). 



