Phoeozoosporinae, Desmarestiacea;, Desmarestia. 459 



l». 1G7 'foniiii a), Soderstr. Desm. acul. (1889) cuin tal)., Kuck. Be- 

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

 ligulata Lyngb. Hydrophyt. Dan. p. 34, t. 44, J5, f. 1, Fiicus acu- 

 leatus L. Sp. plant. II, p. 1632, Fl. Dan. t. 355, Stackli. Ner. hrit. 

 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, Ftwus muscoides Gmel. Hist. Fuc. t. 12 ?. — Fronde 

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

 dccomposito disticho pinnata, pinnis alternis fasciculatisve, ultimis 

 spinulosis; sporangiis (unilocularibus) superficialihus, e septatione 

 ccntrifuga collularuin corticalium ovolutis, zoosporas paucas con- 

 tinentihus. 



Ilah. in ocoano .Vthmtico ex oris Terrfc Nova\ Groenlandiie, 

 Norvegi», Helgolandite usque ad Hispaniam; in mari Nigi-o (Bonnay); 

 ad oras Brasilife (Martius); ad «Moss Beach» Californite (B. M. 

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

 ad littora Camciatcfe (Postels, Euprecht). — Var. compressa 

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

 ramosissima, ramis plerumque oppositis, pinnis majorihus repetite 

 ramosis et pinnulis intermixtis, pinnulis ultimis linearibus, folia- 

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

 niis obsessis; racliide in sectione transversali regulariter elliptica. 

 In scopulis ad oras Georgias meridionalis (Will). — 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. tah. 16, Des- 

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

 Tab. Phyc. IX, t. 95, f. II?, Desmarestia hyhrida 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?) septentrionali, primitus cii-ca insulam Helgolandiam de- 

 tecta (Sonder). 



G. Desmarestia latifrons (Rupr.?) Kuetz. Tab. Phyc. IX, p. 40, t. 95, 7G4 

 f. I, Sp/cidaria latifrons Rupr. herb. — Fronde magna, ramosa, 

 pinnis foliaceis latioribus in petiolum attenuatis, margine remote 

 acuteque dentatis, dentibus hrevibus erectis. 



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

 et forma Desniarestia; aculeata;. Substantia rigida, firma. 



7. Desmarestia affinis Sond. in Kuetz. Tah. Phyc. IX, p. 41, t. 97. 705 

 f. II. — Fronde (basi raniosa?) ramis (?) elongatis, planis, linoari- 

 bus, angustissimis nec divisis nec pinnatis, margine raiuelliforis 



