103 



carnosa , coloreque in olivaceum facile abeunte. A Chondro 



differ t tola structura, habitu aliquando magnopere conveniens. 







ig3. Gr. Jilicina -dg. sp. p. 220. Hal. ramentacea dell. Chiaje 

 Hydr. Neap. Tab. XFI. 



Hab. ad saxa sinuum majorum non nimium demersa, in utroque mari 

 passim; in Mediterraneo usque ad Pozzuoli regni Neapolitan! legi. 



194. Gr. dicliotoma nov. sp. : fronde cylindraceo-compressa di- 

 chotpmo-fastigiata , segmentis patentibus linearibus , ultimis 

 sa?pe elongato-ensiformibus, favellidiis in scgmentis termi- 

 nalibus. 

 Hab. ad rupcs et saxa rcfluxu maris subemersa in sinubtis vehementiori 



mari subexposilis ad littora Galloprovincia3 et Niceaj mens. sept, et oct. legi ; 



etiarn a Risso, Giraadi et So Her communicata. 



Frondes 1 l/2-3pollicares a basi scutata ca'spitosrc, per dichotomias 

 numerosas subflabellato- i'astigiatoK. Segmenia omnino lincaria et lineam lere 

 lata, super axillas acutinsculas patentia; terminalia obtusa aliquando quasi 

 articulato-constricta, soepius valde elongata iocurva in superiore parte glo- 

 merulos sporarnm gcrenlia. Color et substantia antecedentis, cui, nisi 

 tola obstaret ramificatio, Cliomlrum potius suadens, lubenter adjunxissem. 



193. Gr. verruculosa Grev. Sph. verruculosus Ag. sp. p. 266. 



Hab. ad rupesrefluxu maris emersas soleque expositas, ad littora Gallopro- 

 vincia? et Italia? superioris ; ex Corsica giganteam misit Lcveille! 



Cum signo dubii a Greviile ad Grateloupiam relata , me ju- 

 dice, generis sp. genuina. 



LXIII. GIG/VRTINA Lamour. reform. 



Frons cellulis multangulis in fila anastomosantia coordinatis , 

 in centre densioribus, versus superficiem in fila moniliformia 

 densissime stipata abeuntibus constituta. Fructus duplex : Fa- 

 vellidia intra stratum exlernum, in pericarpium subreguiare 

 denique pertusum abiens , nidulantia , intra reticulum fllorum 

 anastomosantium undique ambientium sporas in glomerulum 

 congestas foventia. Splicer o spores oblongae, e cellulis periphericis 

 formatse^ in sporas 4 divisae. Algae cyliadricae aut compressae 



