CEKAMEACEAE. 583 



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



Ccramium transversale Collins & Hervey, Proc. Am Acad 53- 145 vl 5 

 f. 29-31. 1917. ■ ■ • ^ • • 



On various algae, leaves of Ci/modocca, roots of Rhizoiihora, etc near the low- 

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



and Florida to the American ^'irgin Islands. Type from Key West, Florida 



6. Ceramium comiculatum Mont. Ann. Sci. Nat. Bot. IV. 14: ]72. i860. 



Gongroceras comiculatum Kiitz. Tab. Phyc. 12: 25. yl. 81. f. e-g. 1862. 



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 Eichards, Bull. Torrey Club 28: 

 257, 264. 1901. 



1. Ceramothamnion Codii Eichards, loc. cit. pi. SI, 22. 



On Codium intertextum, Atwood Cay : — Bermuda to Barbados. Tvpe from Ber- 

 muda. 



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



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



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

 Centroceras cryptacanthum 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 hyalacanthum Kiitz. loc. cit. 742; Tab. Phyc. 13: pi. If), f. d-f. 

 Centroceras oxyacanthum Kiitz. loc. cit. 742 ; Tab. Phyc. 13 : pi. 20. f. a^c. 

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



On rocks and on various algae, low-littoral and in shallow w'ater ; very common 

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

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

 latum), C. micrucanthum, and C. hrachyacanthuvi. 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, I'eru. 



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. 



Hypnea ? 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. 



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



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



Acantliococcus adelphinus Mont.; Crouan in Maze dsL' Schramm, Alg. Guad. 

 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.). 



