310 Micneozoosporinse, Ralfsiacese, tlalfsia. 



qiiaqiie cellula sinoula, disciformia. Sporangia unilocularia pirifor- 

 niia, (lirecto e cellulis superficialihus transforniatis orta, proininula 

 et in soros congesta. Sporangia plnrilocularia ignota, Csespituli 

 piloruni ignoti. 



1. Sorapion simulans Ivuclc Remerk. Algenveg. Helgoland (1R94), r.oo 

 p. 236, fig. 10. — Fronde obscure brunnea, ])auca millimetra lata; 

 cellulis vegetativis (e vertice visis) 5-12 u. diam,; sporangiis 15- 

 20 'j. diam. 



HaJj. in lapidibus ad oras insulse Helgolandiae, socio Lithoder- 

 mate fatiscente Aresch. (Kuckuck). — Cfr. Lithoderma Kjellmanii 

 Wille et Rosenv. 



Farailia IX. RALPSIACE^ Hauck. 



Ralf&iaccve Hauck [1885] Meei-esalgen p. 401, De Toni Sys*. Uehers. Fncoid. 1891, 

 p. 176, Kjelini. Handljok 1, p. 29, Eiigl. & Prantl Natiu'1. Pflanzeuram. 86, 

 p. 240. 



SlrngulariacccB Stroemf. [1886] Alg. vid Isl. Kust. p. 49. 



Thallus crust?eformis, divisione cellularum peripliericarum seu 

 marginalium crescens. Sporangia ad basin filorum articulatorum e 

 cellulis superficialibus exorientium dense confertorum pleurogena. 



RALFSIA Berk. [1831] in Engl. Bot. Suppl. tab. 2866 (Etym. a claro 

 pliycologo .JoHANNE Ralfs), Kuetz. Sp. p. 543, J. Ag. Sp. I, p. 61, 

 Till Algernes System. IV, p. 57, Reinke Algenfl. westl. Ostsee p. 

 48, Ardiss. Phyc. Med. II, p. 138, De Toni Syst. Uebers. Fucoid. 

 1891, p. 170, Kjellm. in Engl. & Prantl Natiirl. Pflanzenfam. 60, 

 p. 242, Craoriw, Padincv, Fuci, Zonaria% Myrionematis sp. auct., 

 Stragularia Stroemf. [1886] Algveg. vid Islands Kuster p. 49. — 

 Frons plana, orbicularis et crustacea, expansa, per cellularum mar- 

 ginalium divisioncm latitudino crescens, demum ambitu irregularis, 

 (deniquo frondes plures subiml)ricatini dispositie) stratis duobus con- 

 texta, strato basali cellulis cylindraceis in fila horizontalia arctis- 

 sime conjunctis, strato superiore hinc indo cellulis vcrticaliter elon- 

 gatis in fila oblique vel verticaliter excurrentia dense coadunatis 

 constante; celluhc onmes phoeophorum singulum lamina3fornie con- 

 tinentcs. Sporangia vuiilocularia (zoosporangia) obovoidea, breviter 

 stipitat;i, ad basin paranematum radiantium nidulantia, in soros aut 



