iicker Meeriilg. u. 55:;. ,pi:c v,^risiinilliiiie iul Cystoseiram granu- 

 latani pertinet). PliiillamiiUia selacca Kuetz. Phyc. gener. p. 35(i, 

 Sp. p. 598, T;ib. Phyc.X,t. 3:3, f. III-IV, Phiillacanlha trichophylla 

 Kuetz. Phyc. gcuer. p. 35«. Sp. p. 598. Tali. Phyc. X. t. :U, f. I, Cysto- 

 seira setacea Picc. Fl. .Vl.u, S;inl, n, 211. <'r, ,lcl Cor.saro p. 28, 

 PhyUacantha ramosissinia. Kiietz, Sp, p, 5ilii. P/,y/lacantha oliga- 

 cantlia Knetz. iu Bot. Zeit. 1847, p. 52, Sp. p. 590, Tab. Phyc. X, 

 t. 30, f. II. — Caule trunciformi graciliori, frondibus basi incrassata 

 levibus pinuiito-ramosissimis, ramis oppositis, juuioribus planis co- 

 statis liuearil)us basi simpliciusculis apice pinuatifidis, adultioribus 

 filiformilius laxe spinosis, spinis subulatis solitariis; receptiiculis 

 liuiceoliito-ovoideis ; vesiculis ellipsoideis, concatenatis. 



Iluh. \n mari Mediterraneo ad oras insulie Sardiniai (Piccone), 

 Ligurije (Kuetzing, Straffouello), sinus Neapolitani et Terraciuffi 

 (Kuetzing), GraeciiB (Bory), Algeriaj (Montagne) ; ? in mari Adria- 

 tico orientiili (Hb. Zanaudini); inter Malagam et Gibraltar (Haen- 

 SELER, D'Albertis, Piccone) ; iu oceano Atlantico ad litora Lu- 

 sitaniiie circa Olyssiponam .(Martius) , Hispanite ad Gades ( C.\- 

 brera), Africffi ad Tingin (Salzman), a/I insulas Fortunatas (Langs- 

 dorf), ad littora TeiTse Novse Americse borealis (Kuetzing). — 

 Frons juvenilis e caule surgit pollicari, apice in ramos paucos 

 iibeunte. Eami isti inferne folia plana linearia costata usque ad 4 

 millim. lata et 4,5-7 cm. longa, inferne integerrima, apice incisa, 

 .[jerunt, superue iu folia pinnatifida et dentata, mox vesiculosa,, sol- 

 vuntur. Stirps adulta caule gaudet 4-7 cm. longo, penniTe anse^ 



