1272 Eu-Floridete, Griffithsiese, Griffithsia. 



furcatis et articulis pluribus constitutis. His melius investigatis, 

 forsan genus esset in plura genera segregandum, ut prima vice 

 jam proposuit celeberrimus Naegeli. Involucra cystocarporum 

 ramulis subsimilibus formata, at diverso modo disposita; iu 

 nonnullis lateraliter subsessilia, in aliis pedunculata h. e. in 

 ramulo laterali brevissimo terminalia. Tetrasporangia inferiore 

 latere involucri seriata aut agglomerata, transformatione ramelli 

 minutissimi, simplicis aut divisi orta, infra perisporium laxius 

 hyalinum triangule divisa. Cystocarpia plerumque plura intra in- 

 volucrum conjuncta, singula sacculo hyalino cincta. Gonimoblasti 

 1-2, conlluentes aut in gonimolobos plures discretos evolutione 

 succedanea ortos divisi; fere omnes cellulse gonimoloborum in 

 carposporas mutantur. Antheridia in pluribus speciebus observata, 

 intra involucrum subsimile ut plurimum obvenientia, oblongo- 

 turbinata, glomerulis plurimis cellulis minutissimis agglomeratis 

 conrlatis, circa axim dispositis constantia. Genus amplectitur spe- 

 cies numerosas, alias in oceano Atlantico, Mediterraneo et Adriatico, 

 alias in oceano Australi ad Africae meridionalis littora et in Pa- 

 cifico ad oras Nova» Hollandia^ ac Tasmanise obvenientes. 



Sect. I. Acrocladia Ardiss. Phyc. Medit. I, p. 8B, Griffithsia (Ag.) Naeg. Beitr. 

 Ceram. (1861) p. 15G. Involucra tetrasporangioruni ramellis incurvis con- 

 stantia, in ramulo laterali terminalia. 



1. Griffithsia opuntioides J. Ag. Alg. med. p. 76, Sp. II, p. 83, Epicr. 19S6 

 p. 68, Florid. Morphol. t. I, f. 9, Mont. Fl. Alg. p. 143, Kuetz. 

 Sp. p. 664 (non Tab. Phyc. XII, t. 27, f. a-b?), Ardiss. Phyc. 

 Med. I, p. 85, Hauck Meeresalgen p. 94, Zanard. Icon. phyc. Adriat. 

 t. 64, B, Griffithsia neapolitana Kuetz. Tab. Phyc. XII, p. 9, 

 t. 28, f. a-c, Ascocladium neapolitanum Naeg. Ceram. (1861) 

 p. 393, Grif/lthsia olalmatica Kuetz. Tab. Phyc. XII, p. 9, t. 28, 

 f. d-f, Gri/fUhsia corallina tenuior De Not. Sp. Alg. Lig. n. 103 

 (sec. Ardissono). — Fronde casspitosa, erectiuscula, dichotoma fasti- 

 giata, segmentis erectiusculis, articulis superioribus oblongis dia- 

 metro 4-6-plo longioribus, fertilibus piriformibus in ramulo abbre- 

 viato terminalibus, intra involucrum, ramellis simplicibus abbre- 

 viatis incurvis constans tetrasporangia gerentibus. 



Ilab. inter alias Algas repens ad rupes maris Mediterranei; 

 ad littora Algerise (sec. Montagne), Italiae (J. Agardh, Martens), 



