820 En-Floridccie, Cystoclonipffi, Rissocllo. 



1. flahaultia appendicuiata (Schousl).) Boni. Alg. dc Schousboe p. 279, ^'^^'^ 

 t. II, r. 4-7, Plutoma appendiculata Schousb. Icon. ined. t. 251, 

 Descript p. 224. — Characteres generis. 



Hah. ad locuni «Dar Hamra» dictuni in oris Tingitanis, au- 

 tumnali tenipore (Schousboe). — Frons scuto parvulo afTixa, niox ani- 

 pliata, 2-10 cm. lata, 210 , crassa, diverso modo divisa, margine 

 appendiculata, processibus subrotundis, subpetiolatis, irregularil)us. 

 Cystocarpia lacinias et appendices fromlis occupantia, immersa, 

 uno latere hemisplia^rica, prominentia, carpostomio aperta. Tetra- 

 sporangia in processibus marginalibus evoluta, oblonga, 21-9 . 

 Color purpureus. Sul)stantia cartilagineo-gelatinosa. 



RISSOELLA J. Ag. [1849] in Act. Holni. 1849, p. 7, Sp. II, p. 240, Epicr. 

 pag. 288 (Etym. a claro J. A. Risso, botanico nicsesensi), Ardiss. 

 Phyc. Medit. I, p. 184, Schmitz et Hauptfl. in Engl. & Prantl 

 Natiirl. Pflanzenfam. 142 (189G) p. 373, Krinacea Lamour. [1824] in 

 Dict. class. d'Hist. Nat. VI, p. 258, De Not. Spec. Alg. Lig. p. 287, 

 Grateloupice, Sphccrococci, Halymenice, Fuci sp. auct. — Frons 

 complanata, laciniata, golatinoso-cartilaginea, stratis duobus con- 

 texta, medulhiri filis in reticulum laxum quoquoversum anasto- 

 niosantibus, exteriore filis verticalibus moniIiformil)us muco soli- 

 descente cohibitis constituto. Cystocarpia intra pcricarpiuni exter- 

 num, demum apice ruptuni, nucleum compositum foventia; nucleoli 

 circa placentam elevatam, ramis anastomosantibus ramosam, quo- 

 quoversum radiantes, columnis filorum sterilium a placenta ad 

 ambientem plexum extensis separati, filis carposporiferis fascicu- 

 latis inferne articulatis, superne clavato-obovatis constituti; carpo- 

 spora3 rotundato-oblongte, in articulis singulis plures, demum quasi 

 uiuco cohibita\ Tetrasporangia strato corticali immersa, sparsa. 

 zonatim divisa. 



Obs. Frondes gregari;©, plana', cuneatre, varie (Uvisa,^ margineque 

 denticulata}, recentes gelatinoso-carnosa?, exsiccata; subcartilagine^e, 

 violacco-fuscescentes. Denticuli marginales initio minutissimi spi- 

 nulilbrmcs, dein bifidi et sensim majores, demum in lacinias fron- 

 dis excrescere videntur, Stratum intcrnum frondis ('{■llulis minutis 

 subcylindraceis, per ramos anastomosantes cum proximis conjun- 

 ctis, reticulum laxum ita formantil)us, constat. Externum stratum 

 filis vcrticaliter ab interiore cxeuntibus dichotomo-fastigiatis mo- 

 niliforniibus, nnico solidescente cohibitis constat, cellulis niinutis 

 rotundatis. in inferiore fili partc anastomoscs cmittcntibus. Cysto- 



