Eu-Floridese, Callithamniese, Callithamnion. 1327 



pinnati, pinnis decompositis, pinnulis inferioribus subhorizontaliter 

 patentibus ssepe retrorsum arcuatis, superioribus conniventibus. 

 Articuli pinnarum diametro duplo longiores. Tetrasporangia in 

 pinnis simplieiusculis plurima (5-6), secunda. Cystocarpia lohato-ro- 

 tundata, sa?pius gemina. Color purpureo-roseus. 



B. Species subdichotomo-ramosge h e. ramis duobus insequilongis (uno caulem 

 continuante, altero ramum referente) ex eodem articulo egredientibus in- 

 structse. 



Sectio IV. FastioiatyE J. Ag. Epicr. p. 37: frondes dichotomo-subfastigiatse. 



24. Callithamnion fastigiatum Harv. Pl. Tasm. II, p. 336, J. Ag. Epicr. 2067 

 p. 38. — Fronde pellucide articulata, sursum conspicue attenuata, 

 decomposito-dichotoma fastigiata, ramis erecto-patcntihus, articulis 

 superiorihus subcylindraceis diametro suh 4-plo longioribus, ra- 

 mellis hrevissiniis infra genicula provenientibus subquaternis in- 

 vicem distantibus fasciculum tetrasporangiorum gerentibus; tetra- 

 sporangiis in fasciculo singulis maturescentihus, adparenter verti- 

 cillatis aut oppositis. 



Hab. ad oras Tasmanise (Gunn). — Frons 2-5 cm. longa. Sua- 

 dente claro J. Agardh est hrec species distinctissima, typo vix cum 

 alia conveniens, forsan ad genus sui juris demum referenda. 

 Harvey ad Callithamnion retulit, quod quoque cystocarpia nuda 

 axillaria, ab eo observata, probare viderentur; habitus et tetraspo- 

 rangia revera in ramulis hrevihus verticillatis provenientia magis 

 Griffithsiam indicant. Ramiricatio dichotoma cum Antithamnio 

 cruciato non bene quadrat; sed ipse Agardh de norina divisionis 

 tetrasporangiorum valde dubitat; videntur tetrasporangia immatura 

 nempe ovalia et cruciatim divisa, maturescentia vero rotundiora et 

 triangule divisa. 



>ectio V. Coryubosje {Byssoidece J. Ag. Epicr. p. 38 partim): frondes dichotomo- 

 subpinnatse, ssepe ima basi subcorticatse. 



25. Callithamnion caudatum J. Ag. Symb. pag. 46, Alg. med. pag. 72, 2068 

 Sp. II, p. 35, Epicr. p. 38, Kuetz. Sp. p. 645, Tah. Phyc. XI, 



t. 77, f. a-b, A-rdiss. Phyc. Medit. I, p. 64, Callithamnion fiaget- 

 lare Zanard. in Giorn. botan. ital. II, 1846, p. 38, Icon. phyc. Adriat. 

 t. 27?, Caltithamnion elongellum Zanard. in Giorn. hotan. ital. II, 

 1846, p. 38. — Fionde erectiuscula, alterne decomposito-pinnata, a 



