CERAMIACEAE. 583 



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



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

 f. S9S1. 1917. 



On various algae, leaves of Cymodoaea, roots of BMzaphora, 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 comiculatum Mont. Ann. Sei. Nat. Bot. IV. 14: 172. 1860. 



Oongroceras comiculatum Kiitz. Tab. Phyc. 12: 25. pi. 81. f. e-g. 1862. 



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

 Island, Blminl, Mariguana, and Calcos Islands ; — Florida to Guadeloupe and Mar- 

 tinique. Type from Guadeloupe. 



12. CERAMOTHAMNION Eichards, Bull. Torrey Club 28 : 

 257, 264. 1901. 



1. Ceramothamnion Codii Eiehards, loo. cit. pi. SI, SB. 



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

 muda. 



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



1. Centroceras clavuld.tum (Ag.) Mont, in Durieu, I'l. Algeria 1: 140. 1846. 



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

 Centroceras cryptacanthum Kiitz. loc. cit. 741; Tab. Phyo. 13: pi. 17. f. 



or-d. 1863. 

 Centroceras micrcmthemum Kiitz. loc. cit. 741; Tab. Phye. 13: pi. 18. f. Or-d. 

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

 Centroceras oayacanttmm Kiitz. loc. cit. 742; Tab. Phyc. 13: pi. SO. f. Or-c. 

 Centroceras irachyaoanihum Kiitz. Tab. Phyc. 13: 8, pi. SO. f. d-f. 



On rocks and on various algae, low-littoral and 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. micraoanthum, and 0. trachyacanthum. New Providence, Eose Island, 

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

 Exuma Chain, Watling's Island, Mariguana, Calcos Islands, Great Bagged Island, and 

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

 warmer seas. Type from Callao, Peru. 



Family 13. DUMONTIACEAE. 



1. DUDEESNAYA Bonnem. Jour. Phys. 94: 180. 1822 (not seen). 



1. Dudresnaya bermud^nsis Setchell, Univ. California Publ. Bot. 4: 244. pi. 

 S7. 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. 



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

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



95. f. 0, d, e. 1867. 

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

 Ochtodes filiformis 3. Ag. Act. Univ. Lund. 8": 5. 1872. 

 Acanthococcus adelphinus Mont.; Grouan in Maz6 & Schramm, Alg. Guad. 



189. 1870-1877. 



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

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

 Mus. Paris.). 



