Eu-Floridese, Ptilotese, Pluruaria. 1383 



articuli isti diamctro sequalcs, iufra geniculum sunt utrinque con- 

 tracti ct ita forma fere urccolati. Pinnellae regulariter oppositae, in 

 articulis vicinis basi subcontiguae, simplici articulorum diametro 

 sequalium serie constitutae. Tetrasporangia cx terminali pinnellae 

 articulo transformata. Cystocarpia apice pinnuloe gemina, nuda aut 

 pinnellis proximis leviter incurvis suffulta. De cystocarpiis nudis 

 dubia nonnulla protulerunt auctores, de quorum obscrvationibus 

 caute disseruit clarus Buffham, qui pro hac specie. praeter cysto- 

 carpia genuina involucrata et tetrasporatigia, sporangia polyspora 

 adesse suspicatus est; organa hsec forsan descripsit et icone illu- 

 stravit clarissimus Pringsheim Beitr. Morph. der Meeresalgen (1862) 

 tab. 8. 



Plumaria Schousboei (Born.) Schm. Klein. Bcitr. Florid. VI (1896) 2169 

 pag. 7, Born. Alg. dc Schousboe pag. 330, Callithamnion elegans 

 Schousb. in C. Ag. Sp. II, p. 162, Kuetz. Sp. p. 647, Born. ct 

 Thur. Not. algol. p. 32, t. 10, J. Ag. Sp. II, p. 25, Epicr. p. 16, 

 Ilauck Meeresalgen p. 76, Ardiss. Phyc. Medit. I, p 75 (non Cal- 

 litliamniofi elegans Kuctz. Tab. Phyc. XI, t. 99, f. a-d, forsan 

 generi Compsothamnio adscribendum), Ptilota Schousboci Born. 

 in Born. et Thur. Not. algol. p. 34, Ccramium Penna, Ptnma 

 vel Pteroma Schousb. Alg. n. 244-245, Callithamnion Penna 

 Scliousb. Icon. ined. t. 386-387, Callithamnion pulchcltum Schousb. 

 Alg. Schousb. n. 246, (sec. Bornet) Gymnothamnion elegans J. 

 Ag. Anal. algol. (1892) p. 27, t. I, f. 11-14. — Filo primario 

 repente, fllis secundariis erectis a basi fere pinnatis ambitu oblon- 

 gis, pinnis oppositis patentibus simplicibus aut superioribus in 

 pluniam consimilcm evolutis, articulis in rachido diametro duplo 

 longioribus; tetrasporangiis in articulo terminali pinnarum nidu- 

 lantibus. 



Ilab. in saxis arena obductis in oceano Atlantico ad Tingin 

 (Schousboe) ; ad « Biarritz » (Bornet); in mari Adriatico pr. « Ro- 

 vigno» (Hauck); in mari ligustico ad «Alassio» et «Porto Mau- 

 rizio» (Strafforello) ; in mari Tyrrheno ad Neapolin (Falkenberg) 

 et insulam «Elba» (D. I,a Toscanelli, Ahdisshxe). — Caespites 12- 

 11 millim. longi. Fila primaria repcntia videntur, at breviora, secun- 

 daria erecta, spatio ad basin nuda, dcin per totam longitudinem 

 pinnata, pinnis inferioribus paulo brevioribus, superioribus ali- 

 quando prolongatis et plumosis. Pinnns oppositas angulo 45-600 

 egredientes, invicem distantes, licet infra geniculuni quodque egre- 

 dicntes. Articnli in rachidc diametro vix duplo longioros, in pinnis 



