148 



attenuate diametro basali 3plo longiores, eximie patentes immo subrecurvi, 

 sparsi, inferiores ssepe bini. 



Acantliopli. muscoidem ab hac differre dubito; characteri- 

 bus datis saltini non distinguenda. 



TRTBUS V. SPHjEROCCOIDEjE. 



Frons cellulosa continua , ccllulis rotundatis angulatisve 

 ooritexta. Fructus duplex: Coccidia ad frondem externa, intra 

 pericarpium eellulosum denique apertum, sporas obovatas in 

 articulis fllorum moniliformium e placenta centrali egredien- 

 tium formatas, in glomerulum congestas, generantia. Sphoero- 

 sporce in soris indefinitis per frondem sparsae , minutae , 

 sphsericae aut oblongee, intra perisporiurn hyalinum in sporas 

 4 triangule aut cruciatim (?) divisae. 



In observatiuncula (symb. p. n) jam antea monui, Genera 

 quae /. c. Sphcerococcoideis adnumera\i , in fructu capsulari 

 differentias. ulleriori examini subjiciendas ofFerre. Aliam hujus 

 tribus limitationem hoc fructuum accuratius exameii necessa- 

 riam reddidit, et multae species, quse olim genus Sphcerococci 

 ingrediebantur, ad Cryptonemeas relegate coactus sum. Ut 

 tribum hodie limitamus, genera sequentia Sphcerococcoideis 

 pertinent : Hypnea 5 Gracilaria , Rhodomenia , Heringia, et 

 Splicer ococcus. 



LXXVI. HYPNEA Lamour. Grev. syn. n. LXVII. reform. 



Frons cellulis oblongo-angulatis, versus superflciem minori- 

 bus, constituta. Fructus duplex : Coccidia hemisphaerica apicu- 

 lata, perforata, sporas obovatas ad placentam hemispba3ricam 

 affixas intra pericarpium eellulosum foventia. Sphcerosporce 

 oblongae in cellulis periphericis nidulantes, denique in sporas 

 4 cruciatim divisae. Algae cylindrical enerves membrana- 

 ceo-cartilagine33, ex atrovirente purpuracentes , ramosissimse. 



