3GI Pha3ozoosporinso, Larainariaceae, Lessonia. 



Hah. in oceano Pacifico ad littora Chilensia, usque ad Caput 

 « Horn » descendens (Bory, Gay, Suhr, Areschoug, Binder, Mar- 

 CAcci, Piccone); ad & Tahiti » fGRUNOw, Exped. Novara). — Callus 

 radicalis, neque radix librosa ramosave, siccus durissimus, rotun- 

 datus ct diain. 10 cm. aequans, plures emittens truncos inajores 

 (ad 15 dm. longos). Laminae quoad magnitudinem admodum variabi- 

 les, s;vpius 2-3 cm. latoe, colore e castaneo nigrescentes, in sicco 

 coriacete, opaca3. Huic speciei peraffinis videtur, pneeunte chiro 

 Ares(dioug, Lessionia Berteroana Mont. [= Lesso nia Siihrii J. Ag.). 



3. Lessonia fuscescens Bory Voy. Coquille p. 75, t. 2-3, Post. et 602 

 Rupr. Illustr. Alg. p. 2, t. 3, Hook. & Harv. Crypt. antarct. p. 

 151, t. 107, 168 A et 171 D, .1. Ag. Sp. I, p. 151, Kuetz. Sp. 



p. 581, Aresch. Observ. phycoL V, p. 9, Lessonia? flaiHcans D'Urv. 

 Fl. des MaL n. 29. — Stipite compresso, superne phino, decompo- 

 sito-dichotomo, segmentis in himinas ipsis multiplo latiores hm- 

 ceolato-lineares, margine dentibus validis ^aut in adulta obsoletis) 

 repando, abeuntibus. 



Hah. in oceano Pacifico ad littora Chilensia (Hb. Binder, Za- 

 NARDiNi), in mari australi ad Cap. «Horn», insuhis Mahiinas et ad 

 terram Kerguelensem (Hooker). — Plantne gregari;;e silvam submari- 

 nam efficientes, refluenti mari apicibus emersam. Truncus arboreus 

 inferne compressus,2-3metr. longus, femur hominis crassitie tequans, 

 decomposito-dichotonius, ere^^tiuscuhis, frondil)us ex apice pendulis. 

 Stipes ima basi teretiusculus, mox omnino planus evadit, parcius 

 dichotomus. Segmenta superiora sunt 6-7 nim circiter hita, sen- 

 sim in laminas ad 50 cin. et ultra longas expinsa. Lamime la^ti- 

 colores, sicc« fere chartace?e, 2-5 cin. hihie, sunt fere omnino linea- 

 res apicibus angustatis. Margo iaminarum juvenilis est dentibus 

 validis repandus; adultas fert dentes magis magisque ol>soletos. de- 

 nmm evanidos. 



4. Lessonia ovata Hook. et Harv. Crypt. Antarct. p. 15:5, tab. 167- ^03 

 168 B et tal). 171 C, J. Ag. Sp. I, p. 152, Kuetz. Sp. p. 582, Gra- 

 bcndorfer Beitr. Kennt. d. Tange 1885. p. 13, t. VI, L 9-13 (ana- 

 tomia). — Stipite tereti, superne complanato, decomposito-dichoto- 

 mo, segmentis in laminas ipsis multiplo latiores, lineari-oblongas, 

 inargine glanduloso-repandas aut integerrimas abeuntibus. 



Hah. in oceano Pacifico ad littora Chilensia (Bouv, D" Urvil- 

 i-e), ad insulas Maluinas ^Hooker). — Stipes ftruncus) lignosus, ar- 

 l»()reus, cylindricus, dicliotomiis iiunici^osissimis (lecompositus. aj^ice 

 comprcssus. iiaiiiiiia' iis^iuc ad ^l dm. loiiga'. 2 (aii. lala' aul iatiorcs. 



