Phseozoosporinae, Desmarestiacea?, Desmarestia. 459 



p. 167 (forma a), Sodorstr. Desm. acul. (1889) cum tab., Kuck. Be- 

 merk. Algenveg. v. Helgoland p. 247, f. 17 (sporangia), Desmia 

 ligulata Lyngb. Hydrophyt. Dan. p. 34, t. 44, B, f. 1, Fucus acu- 

 leatus L. Sp. plant. II, p. 1632, Fl. Dan. t. 355, Stackh. Ner. brit. 

 tab. 8, Turn. Hist. Fuc. tab. 187, Engl. Bot. tab. 2445, Desm. 

 inanis Post. et Rupr., Sporochnus aculeatus Ag. Sp. I, p. 151, 

 Syst. p. 259, Fucus muscoides Gmel. Hist. Fuc. t. 12'?. — Fronde 

 compressa, filiformi, coriaceo-cartilaginea, costa immersa percursa, 

 decomposito distiche pinnata, pinnis alternis fasciculatisve, ultimis 

 spinulosis; sporangiis (unilocularibus) superficialibus, e septatione 

 centrifuga celluUirum corticalium evolutis, zoosporas paucas con- 

 tinentibus. 



Ilab. in oceano Atlantico ex oris Terrns Novse, Groenlandise, 

 Norvegiae, Helgolandiae usque ad Hispaniam; in mari Nigro (Bonnay); 

 ad oras Brasili^e (Martius); ad «Moss Beach» Californiaj (B. M. 

 Davis, C. L. Anderson); forsan eadem species in oceano Pacifico 

 ad littora CamciatCcie (Postels, Ruprecht). — Var. compressa 

 Reinsch in Flora 1888, p. 490: fronde coriaceo-cartilaginea, e basi 

 ramosissima, ramis plerumque oppositis, pinnis majoribus repetite 

 ramosis et pinnulis intermixtis, pinnulis ultimis linearibus, folia- 

 ceo-compressis. 1-2 mm. latis, marginibus spinis dispersis subfir- 

 mis obsessis; rachide in sectione transversali regulariter elliptica. 

 In scopulis ad oras Georgise meridionalis (AVill). — Var. media 

 (Ag.) J. Ag. Sp. I, p. 168, Rosenw. Groenl. Havalger p. 858, Sporoch- 

 nus medius Ag. Sp. I, pag. 153, Icon. Algar. ined. tab. 16, Des- 

 marestia ^nedia Grev. Syn. p. XL, Kuetz. Sp. p. 571 ex parte, 

 Tab. Phyc. IX, t. 95, f. II?, Desmarestia hybrida Kuetz. Phyc. 

 german. p. 274 (ex insuLa Helgolandia), Sp. p. 571, Tab. Phyc. IX, 

 t. 83, f. I : pinnis fere omnibus oppositis. In oceano Atlantico (et 

 Pacifico?) septentrionah, primitus circa insulam Helgolandiam de- 

 tecta (Sonder). 



Desmarestia latifrons (Rupr.?) Kuetz. Tab. Phyc. IX, p. 40, t. 95, 764 

 f. I, Spicularia latifrons Rupr. herb. — Fronde magna, ramosa, 

 pinnis foliaceis latioribus in petiolum attenuatis, margine remote 

 acuteque dentatis, dentibus brevibus erectis. 



Hab. in oceano Pacifico septentrionali (Ruprecht). — Habitus 

 et forma Desmarestuv, aculeatm. Substantia rigida, firma. 

 , Desmarestia affinis Sond. in Kuetz. Tab. Phyc. IX, p. 41, t. 97, 765 

 f. II. — Fronde (basi ramosa?) ramis (?) elongatis, planis, fineari- 

 bus, angustissimis nec divisis nec pinnatis, margine ramefiiferis 



