306 Plic'cozoosporinae, Lithodermatacecs, Lithoderma. 



« Genova » (Dufour), in mari Tyrrheno ad oras Sardinia? (Gennaei, 

 Marcacci, Piccone); ad insulam Galitam (D'Albertis, PiccoNE);ad 

 oras sinus neapolitani; in mari Jonico ad oras insula^ Siciliae (Ar- 

 dissone), in mari Adriatico ad oras Istriaj (Zanardini, Hauck, Lie- 

 chtenstern) et Dalmatia? (Zanardini, Sandri, Vidovich, Meneghi- 

 Ni); in oceano Atlantico ad oras Galliiie, imprimis ad « Brest » 

 (Crouan); in mari Indite occidentalis ; ad insulas Marchionales Po- 

 lynesife (Hb. Zanardini), — Diam. frondis usque ad 10 cm. 



II. B. ZooGONic.E isoGONiCiE Kjellm. 



Zoocjonicce Isogonicce Kjellm. [1890] Handbok Skand. Hafsalgll. I, pag. !7. 

 Phseozoogameta (in sporangiis plurilocularibus, ut videtur, saepius evoluta) et 

 mascula et fojminea magnitudine conformia vel fere conformia. 

 I. Heteroblepha.re.'E. 



Zoogonidia biciliata, ciliis insequilougis, plus minus lateraliter insertis, uno 

 antice, altero postice verso. 



Familia VIII. LITHODERMATACE^ Kjellm. 



Lithodermatacece Kjellm. [1885] Alg. of the Arctic sea p. 255 {Lithoderma- 

 tew), Engl. & Prantl Natiirl. Pflanzenfam. 97, p. 260, De Toni Syst. Uebers. Fu- 

 coid. 1891, p. 176, Hansg. Prodromus I, p. 33 {Lithodermacecc). 



Frons crustaeformis, pagina inferiori arcte adnata, parenchymatica, 

 crescentia peripherica donata. Sporangia unicularia globosa aut piri- 

 formia, e transformatione cellularum superficialium orta. Sporangia 

 plurilocularia oblonga, in lilis articulatis e cellulis superlicia.Iihus 

 frondis exsurgentibus pleurogena (sec. Areschoug) aut eodem inodo 

 ac sporangia unilocularia e transformatione cellularum superficialium 

 exorientia, locellis 8 singula serie superpositis (sec. Kuckuck). 



Conspectus generum. 



Lithoderma Aresch. — Phaeophora lenticularia in unaquaque ccllula plura. 



Sporangia unilocularia plerumque globosa. 

 Sorapion Kuck. — Pliajophorum laminaeforrai-discoideum in unaquaque cellula 



singuhim. Sporangia unilocularia piriformia. 



LITHODERMA Aresch. [1875] Observat. phycologicii; part. III, p. 22 

 (Ktym. f/thos lapis et derma cutis), Kjellm. Han(Il)ok Skand. Ka.fs- 

 algn. I (1890), pag. 17 et in Engl. & Prantl Na,tiirl. Pnanzenfam. 

 97, p. 262, De Toni Syst. Uebers. Fucoid. 1891, p. 17G, Kuck. 



