ECTOCARPACEAE. 589 



1. CoraUina cubensis (Mont.) Kutz. Tab. Phyc. 8: 37. pi. 77. f. c, e, f. 1858. 



Jania cubensis Mont.; Kiitz. Sp. Alg. 709. 1849. 



Forming dense cushions on various algae (Sargassum, G-alaxaura, Digenea, etc.) 

 and on rocks with other algae, in shallow water, often associated with species of 

 Jama, New Providence, Berry Islands, Great Bahama, Gun Cay, Caicos Islands and 

 Great Ragged Island ; — Florida to the American Virgin Islands. Type from Cuba. 



2. CoraUina subulata Ell. & Soland. Nat. Hist. Zooph. 119. pi. SI. f. B, 6. 1786. 



On or with Amansia multifida, Eleuthera : — Brazil. Type from the West Indies. 



9. JANIA Lamour. Nouv. Bull. Sci. Soc. PMlom. 3; 186. 1812. 



The characters relied upon to distinguish the currently recognized European 

 and West Indian species of Jania appear to tie unstable and unsatisfactory and 

 the determinations often arbitrary. 



Branches mostly strict and fastlgiate, mostly 100-160 « in diam- 

 eter, the terminal segments usually acute or taper-pointed. 1. J. ruhens. 

 Dichotomies mostly wide-angled, the branches often subdivaricate, 

 recurved, and interwoven, the terminal segments usually 

 obtuse. 

 Segments mostly 90-150 « in diameter and 2-4 times as long 



as broad. 2. J. adhaerens. 



Segments mostly 50-100 « in diameter and 4-10 times as long 



as broad. 3. J. capillacea. 



1. Jania rubens (L.) Lamour. loc. cit. 



CoraUina rubens L. Syst. Nat. 1: 806. 1758 [ed. 10]. 



On Sargassum, Chondria, and other algae, from low-water mark down to a depth 

 of 10—20 meters. Rose Island, Great Bahama, Exuma Chain, Watling's Island, Caicos 

 Islands, and Great Ragged Island : — Bermuda ; Florida ; Cuba ; and probably through- 

 out the West Indies. Type European. 



2. Jania adhaerens Lamour. Hist. Polyp. 270. 1816. 



CoraUina adhaerens Kiitz. Tab. Phyc. 8 : 40. pi. 83. f. d, f, g, h. 1858. 



On Sargassum, Bryotham.nion, Gelidium, etc., in shallow water : — American Vir- 

 gin Islands; Red Sea; Japan. Type from the Mediterranean Sea (?). 



3. Jania capillacea Harv. Ner. Bor.-Am. 2: 84. 1853. 



On Sargassum, pneumatophores of Avicennia, etc., in shallow water, and more 

 or less free in lagoons. New Providence, Rose Island, Berry Islands, and Great Ragged 

 Island : — North Carolina and Florida. Type from Bahia Honda, Florida. 



SuB-cLAss PHAEOPHYCEAE. 



Family 1. ECTOCARPACEAE. 



1. PYLAIELIiA Bory, Diet. Class. Hist. Nat. 4: 393 (as Pilayella). 1828. 



1. PylaieUa Antillarum (Grun.) De-Toni, Syll. Alg. 3: 535. 1895. 



Ectocarpus {Pilayella) Antillarum Grun. Eeise Novara Bot. 1 : 46. pi. 4. f. 

 2. 1867. 



PylaieUa sp. Bornet, Eev. Gen. Bot. 1:9., 1889. 



Pylaiella Sooperi De-Toni, Syll. Alg. 3: 537. 1895. Probably not Ecto- 

 carpus Hooperi Harv. Ner. Bor.-Am. 1: 143. pi. IZE. 1852. 



Forming yellowish brown, subeylindric, wick-llke tufts, 1.5-3.5 cm. high in tide- 

 pools and low-littoral on surf-beaten rocks. Great Stirrup Cay, Berry Islands : 



Bermuda to northern South America. Type from Guadeloupe. 



