79 



Nesea penicillus var. ramulis crassioribus Deslongchamps in Encyclop. Méth. Zoophyt. 1824 — 5. 



p. 568. 

 Nesea pyramidalis Blainville Uict. Sci. Nat. XXXIV. 1825. p. 493. 

 Penicillus pyramidalis Blainville Man. d'Actinolog. 1834. p. 553. 

 Penicillus pyramidalis Decaisne Mém. sur les Corallines 1. c. 1842. p. 109. 

 Penicillus Lamourouxii Endlicher Mant. Bot. Gen. Plant. Suppl. III. 1843. p. 18. 

 Corallocephalus Oedipus Kutzing Phyc. Gen. 1843. p. 310. 

 Corallocephahis pyramidalis Kützing Spec. Alg. 1849. P- 5°ö- 

 Corallocephalus Lamourouxii Kutzing Spec. Alg. 1849. p. 506. (non Tab. Phyc. VIII. 1858. 



tab. 29, I.) 

 Penicillus Lamourouxii De Toni Syll. Alg. I. 1889. p. 502. 

 Penicillus Lamourouxii A. & E. S. Gepp in Journ. of Bot. XLIII. 1905. p. 2. 

 Penicillus Lamourouxii Collins Green Alg. N. Amer. in Tufts College Studies II. 1909. p. 392. 



forma typica. 



Hab. ATLANTIC. West Indies, Banc de Bahama, Herb. Laniouroux, type of P. Lamourouxii Decne. ! — 

 Bahamas, Great Exuma, Georgetown, Howe, n" 4081 ! — No locality, Herb. Chauvin, sub 

 nom. Corallocephalus dumetosusl — Annato Bay, Jamaica, Pease and Butler in Herb. Collins ! 



var. gracilis. A. & E. S. Gepp 



in Journ. of Botany XLIII, 1905, p. 2. 



Penicillus Lamourouxii var. gracilis Collins Green Alg. N. Amer. in Tufts College Studies II. 

 1909. p. 393. 



Hab. Atlantic. Florida, Key West, in 3 — 10 dm. of water at low tide, Oct. 25. 1902, M. A. Hozve 

 n" 1412/'! — Florida, Tarpon Key, Curtiss in Herb. Mus. Brit.! — Bahama Bank, Rayner 

 in Herb. Mus. Brit. ! — Bahamas, Bemini Harbour, with other species of Penicillus and 

 Rhipocephalus, Apr. 16. 1904, M. A. Hozve n° 3238! — Bahamas, Fort George Cay, Caicos 

 Islands, Howe in Phyc. Bor. Amer. n u 1476! — West Indies, Scrivener Collodion in Herb. 

 Mus. Brit.! -- Manchioneal, Jamaica, Pease and Butler in Phyc. Bor. Amer. n° j6(j\ — 

 St. Croix, B'órgesen in Herb. Börgesen ! 



Stipes unbranched, rather short, 25 — 40 mm. in length, 5 — 8 mm. in diameter, usually 

 compressed, rarely subcanaliculate on one side when dry, thickly encrusted, smooth, hollow, 

 soft and compressible, not penetrating into the capitulum. Surface of stipes appearing pseudo- 

 porose under microscope. 



Capitulum springing from apex of stipes, often globose, about 2 — 5 cm. in diameter. 



Filaments of capitulum rigid, ascending, well calcified, about 300 — 500 u. in diameter, 

 constricted at unequal intervals, often globosely constricted below the dichotomy. 



Filaments of stipes bearing lateral appendages which are 3 — 4 times dichotomously 

 divided and terminated by short truncate apices. [Figs. 160 — 163]. 



forma typica. 



Capitulum composed of sparse filaments, mostly 400 — 500 u. thick. 



var. gracilis. 



Capitulum usually larger, denser, filaments of the capitulum twice as numerous as in 

 the type and more slender (300 — 400 u, rarely 450 u. thick), ascending, much calcified. and 

 very slightly entangled. 



