480 Phnpozoosporinse, Etico;liacere, Litliosiphon. 



Hab. ad frondeni Alarice esculentcu pr. «Kilkeo» HibernicTe 

 (T. Johnson). — An eadem species ac Lithosiphon Lciminaricje, 

 ut icon pro Bangia Laminarice ab ill. Lyngbye exhibita docet. 



LITHOSIPHON Harv. [1849] Manual p. 43 (Etym. litlios lapis et si- 

 plLOn tubus), Kjellm. Handbok I. p. 62, Engl. Prantl Natiirl. Pflan- 

 zenfam. 8G. Lief. p. 201, De Toni Syst. Uebers. Fucoid. 1891, 

 p. 180, Clilorosiphon Kuetz. [1843] Phyc. gener. p. 301 (ex parte?), 

 Aspcrococcus subgen. Chlorosiphon J. Ag. Sp. I, p. 78. — Frons 

 filiformis, versus basin gradatim attenuata, disco radicali affixa, e 

 parenchymate subhomogeneo contextii; pili sparsi; sporangia uni- 

 locuhiria solitaria rotunihito-elliptica; sporangia plurilocularia soli- 

 taria, 4-8-locellata, vix quoad formam a ceteris celluUs vcgetati- 

 vis diversa, e cellulas superficialis singulm transformatione gene- 

 rata, frondi immersa, apice libera; paraphyses absentes. 



1. Lithosiphon pusillus (Carm.) Harv. Phyc. Brit. tab. 270, Man. p. 43, 70D 

 Johnst. & Croall Brit. Sea Weeds III, p. 103, f. 1-G, Kjellm. Hand- 

 bok I, p. 62, Asperococcus? pusillus Carm. in Hook. Br. Fl. II, 

 p. 277, Harv. Manual p. 35, J. Ag. Sp. I, p. 78, Chlorosiphon pu- 

 sillus Harv. Syst. List Phyc. Brit. p. X, Kuetz. Sp. p. 484, Chorda 

 Filum var. trichodes Lyngb. Hydrophyt. Dan. pag. 79, t. 18?, 

 Punctaria pusilla Crouan Fh Finist. p. 167. — Frondibus sub- 

 singulis dense gregariis, simplicibus, filiformibus, asqualibus, fihi- 

 mentis hyalinis verticilhitis. 



Hab. ad algas majores imprimis ad Chordam Filuni in 

 oceano Atlantico ad oras Angii;e (Hauvey, Berkeley, Dickie) et 

 Galfiae (Crouan, Lenormand), in sinu Codano ; ad oras Scandinaviai 

 (Kjellman). — Frondes 4-12 cm. longae, crassitie setae, strict<Te aut 

 incurvae, plantam in qua crescunt densissime obvallantes, sed ut 

 phirimum singul;Te, nec caespitose provenientes, radicufis minutis- 

 simis in plantam qua increscunt introductis adfix?e. Prima inhmtia 

 frons filo articulato, articufis hitioril)us quam longioril)us, constare 

 videtur; subdividuntur vero articuli ct frons cellulosa oritur. Fila- 

 menta tenuissima hyalina, longe articulata. quasi ex apice apiculi 

 simplicis provenientia, totam frondem investiunt; in inferiore parte 

 et in planta juniore sunt fere in fronde verticillata et articulatum 

 adspectum frondi tribuunt. Cellulse frondis rotundahie, sericbus lon- 

 gitudinalihus secus longas spiras dispositie. Sporangia plurilocula- 

 ria 4-8-IoceIIata; sporangia unilocularia subgIol)osa. J. Ag. 1. c. 



