EHODOMEL ACE AE. 



9. Polysiphonia opaca (Ag.) Moris & De Not. M. Capr. 208. pi. 5 II. 1839. 

 Hutchinsia opaca Ag. Syst. Alg. 148. 1824. 



Low-littoral on surf-beaten rocks and in tide-pools, New Providence, Berry 

 Islands, Great Bahama, and Watling's Island : Bermuda ; Florida ; and the Mediter- 

 ranean and Adriatic seas. Type from the Adriatic Sea. 



6. BRYOTHAMNION Kiitz. Linnaea 17: 105. 1843; 

 Phyc. Gen. 433. 1843. 



PHYSCOPHORA Kiitz. loc. cit.; Phyc. Gen. 434. 



1. Bryothamnion triquetrum (S. G. Gmel.) M. A. Howe. Jour. N. Y. Bot. Card. 

 16: 222. 1915. 



Fucus triqueter S. G. Gmel. Hist. Fuc. 122. pi. 8. /. 4. 1768. 

 Fucus trifarius Swartz, Prod. 148. 1788. 

 Fucus triangularis J. F. Gmel. Syst. Nat. 1383. 1791. 

 Plocamium triangulare Lamour. Essai, 50. 1813. 

 Thamnophora triangularis Ag. Sp. Alg. 1: 226. 1822. 

 Alsidium triangulare J. Ag. Linnaea 15: 28. 1841. 

 Physcophora triangularis Kiitz. Linnaea 17: 105. 1843. 

 Bryothamnion triangulare Kiitz. Sp. Alg. 842. 1849. 



From low-water mark down to a depth of 30 meters or more, Bimini and Caicos 

 Islands : Florida to Brazil. Type locality unknown. 



7. LOPHOCLADIA Schmitz, Ber. Deuts. Bot. Ges. 11 : 222. 1893. 



1. Lophocladia trichoclados (Mert.) Schmitz, loc, cit. 



Conferva trichocladia Mert. fide Ag. Syst. Alg. 137. 1824. 



Ceramium Trichocladis Ag. loc. cit. 



Griffitsia? trichoclados Ag. Sp. Alg. 2: 132. 1828. 



Dasya trichoclados J. Ag. Linnaea 15: 32. 1841. 



Dasya lophoclados Mont. Ann. Sci. Nat. Bot. II. 18: 254. 1842. 



Eupogonium ? trichoclados Kiitz. Sp. Alg. 799. 1849. 



Polysiphonia trichoclada Kiitz. loe. cit. 819. 



Polysiphonia lophoclados Kiitz. loc. cit. 834. 



Lophothalia trichoclados J. Ag. Till Alg. Syst. 6: 64. 1890. 



Apparently in deep water, usually found washed ashore, Great Bahama : Ber- 

 muda ; Florida ; Santo Domingo ; American Virgin Islands ; and Barbados. Type 

 from the West Indies. 



8. WRIGHTIELLA Schmitz, Ber. Deuts. Bot. Ges. 11 : 221. 1893. 



Main branches persistent, beset with numerous 4-ranked subu- 

 late ramuli 1-4 mm. long. 1. W. Blodgettii. 



Main branches commonly deliquescent, bearing filiform ramuli 



or a few subulate ramuli. 2. W. Tumanowicsi. 



1. Wrightiella Blodgettii (Harv.) Schmitz, loc. cit. 



Alsidium Blodgettii Harv. Ner. Bor.-Am. 2: 16. pi. 15B. 1853. 



Usually found washed ashore, presumably from deep water, Great Bahama : 

 Bermuda and Florida. Type from Key West, Florida. 



2. Wrightiella Tumanowiczi (Gatty) Schmitz, loc. cit. 222. 



Dasya Tumanowiczi Gatty; Harv. Ner. Bor.-Am. 2: 64. 1853. 



The Bahama plants show five pericentral cells except in ramuli, but appear to be 

 otherwise identical with the Key West type. 



Found washed ashore, Berry Islands and Abaco : Florida. Type from Key 

 West, Florida. 



