EHODOMELACEAE. 671 



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



HutcMnsia opaoa Ag. Syst. Alg. 148. 1824. 



Low-littoral on surtbeaten 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. 



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



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

 16: 222. 1915. 



Fucus triqmter S. G. Gmel. Hist. Fuc. 122. pi. 8. f. 4. 1768. 

 Fucus trifarius Swartz, Prod. 148. 1788, 

 Fucus trimigularis J. P. 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. 

 Physoophora 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 trichficlados (Mert.) Schmitz, loc. cit. 



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



Ceramiuin Trichocladis Ag. loo. cit. 



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



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



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



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



Polysiphonia trichoclada Kiitz. loc. cit. 819. 



Polysiphonia lophoclados Kiitz. loc. cit. 834. 



Lophothalia triehodados 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. WIUGHTIBLLA 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. BlodgettU. 



Main branches commonly deliquescent, bearing filiform ramuli 



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



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. 



