Eu-Florideee, Crouanieee, Autitliauinion. 1413 



t. 80, f. d-i, J. Ag. Sp. II, pag. 32, Epicr. pag. 18, Asken. Alg. 

 Exped. Gazelle p. 35, Pterothamnion ? ternifolium Naeg. Ceram. 

 (1861) p. 142. Fronde erectiuscula, vage dichotoma, laxius ra- 

 mulosa, ramulis abbreviatis ternis simplicibus furcatisque; cysto- 

 carpiis bilobis, ramos terminantibus. 



Hab. in oceano antarctico ad << Cap Horn » in aliis Algis in- 

 sidens e fundo protracta (Hooker); ad « Tuesday Bay » freti Ma- 

 gellanici in Ceramiis (Askenasy). — Species perpusilla, parasi- 

 tica, csespitosa, 0,5-12 millim. longa, vage ramosa, rosea, fiaccida 

 et membranacea. JRamuli e omnibus rainorum articulis orti, ple- 

 rumque terni, raro bini quaternive, graciles, breves, simplices, ere- 

 cto-patentes. Articuli caulis ramorumque diametro 4-5-plo, ramu- 

 lorum subduplo longiores. Cystocarpia magna, rotundata. Tetraspo- 

 rangia triangule divisa a claro J. Agardh dicuntur ! Affine videtur 

 A ntithamn io cruciato. 



28. Antithamnion Ptilota (Hook. et Harv.), Callithamnion Ptilota 2215 

 Hook. et Harv. in Lond. Journ. IV, p. 273, Crypt. Antarct. p. 183, 

 tab. 189, fig. I, Kuetz. Sp. Alg. pag. 648, Tab. Phyc. XI, t. 85, 



f. a-c, J. Ag. Sp. II, p. 32, Epicr. p. 20. — Fronde rigidula, se- 

 tacea, filis erectiusculis ramosissimis dense pinnatis, pinnis vix 

 distichis venoso-striatis opposite pinnulatis, pinnulis simplicibus 

 patentibus subulatis ; tetrasporangiis ad pinnulas sparsis. 



Hab. in oceano Antarctico ad « Crozet » insulas, in Macro- 

 cysti natante insidens (Hooker); ad Terram Fuegiae (Hooker). — 

 Frons 2-5 cm. longa. Caulis crassitudinem setae equinse metiens, 

 repetite pinnatim ramosus, ramis suboppositis patentibus demum 

 deflexis, inferioribus subuncialibus, secundariis brevmsculis pin- 

 natis, pinnis plurimis densis, oppositis, simplicibus subulatis, e 

 omni articulo rami ortis. Articuli diametro duplo longiores. Color 

 fusco-ruber. Specimina exsiccatione chartse vix adhserent. 



29. Antithamnion ? verticillatum (Suhr), Caltithamnion verticiUatum 2216 

 Suhr in Flora 1840, p. 290, J. Ag. Sp. II, p. 34, Epicr. p. 28.— 

 Filo primario simplici ad geniculum quodque ramis 3-4 verticil- 

 latis obsito, ramis alterne et fasciculatim ramulosis. 



Hab. ad Caput Bonae Spei Africae australis. — Frons 6-9 millim. 

 alta. An Spermothamnion ? 



30. Antithamnlon ? Thouarsii (Mont), Callithamnion Thouarsii Mont. 2217 

 Fl. Boliv. p. 9, t. VII, fig. 5, J. Ag. Sp. II, p. 66, Kuetz. Sp. 



p. 618, Tab. Phyc. XI, t. 85, f. d-e. — Filis a basi ramosis, ramis 

 bipinnatis, pinnis pinnulisque oppositis patenti-erectis, ultimis 



