Till Algernes Systematik. 



71 



sim latiora, sublanceoluta, duplici sprio sphtrrosporas triangule divisas fovoiitia; in iiostris 

 adhuc juniora et brcvissiraa, series interruptas in costa coustituentia. 



Milii hanc plantam exaininauti dul)itaii(lum videbatiir, iitrum in illa formam quasi 

 juniorem et teiiuioreni Vid. sjnialis aijnoscerem, au Speciem sui juris. Coniparata vero 

 quoque V. Cliftotli, qua' oundein tVre tvpum refert, at suo modo mutntum, lias omncs Spe- 

 cies diversas at viciuas considcrandas esse putavi. luter plurima specimina V. spiralis, quae 

 vidi, nulluni observavi, in quo spira' dcfieerent; i'rondes liujus seniles (]UO([ue niembranam 

 offerunt firmiorem. dum in F. intermedia specimina fertilia (utriustjue generis fruetuum) 

 parum aut vix firmiorem memlirauum quam juniora et sterilia E;orunt. Coniparata donique 

 structura, dift'erentiam supra indicatam observavi, qua dift'erentiam specificam ulterius corro- 

 boratam credidi. 



CXLIX/,. Heterosiphonia ^lont. Prodi: PlnjcoJ. Äntarcf. ei V«i). l'oJ Sinl 

 p. 137 ; Pohjsiphonia Sp. Harv. et Kütz.; Dasijfc Sp. J. Äg. 



Frons filiformis aut complanata, decomposito-pinnata, nunc artieulata polysipho- 

 nea, nunc fero iisquo ad apicos oorticata, siphonihus in ccorticata 6 — 11, 

 mari>inalibus latioribus, facialibns iitrinqup 2 — 3 ano-ustioribus, cortice (in 

 corticatis) celluloso. Krramnlia o-lobosa, in ramo scssilia, intra poricar- 

 pium ccllulosum, carpostomio torminali apcrtuni, oonimidia pyrifbrrnia in 

 articulo tcnninali filoruni, a placenta basali radiantinm, foventia. SticMdia 

 siliqufpformia, a ramulo transformata, intra articulos brevissimos spha'ros- 

 poras numerosas vcrtieillatas, sinnulas collulis geminis, sursuni et doorsnm 

 secedcntibus corticatas, triangiilc divisas, foventia. Anthcridia conico-lan- 

 coidea, ad ramos superioros lateralia, sa'pc secundata. 



Ft phira alia Genera Rhodomelearmn tum formas artioulatas, sa>pe polysi- 

 phoneas, tum adparcnter inarticulatas, ncmpe cortice obductas comprehenduiit, ita 

 (|ii()(|uc in Bcferosiplwnia. quäle hoc (lenus hodie intellectum voluerim, piwter 

 fbrma.s polysiphoneas et articulatas, quoque corticatas obvenire, non a^gre assu- 

 mcrem. Articulatas primo intuitu Polysiphonire speeies referre satis eonstat; 

 has autem a Polysijihoniis differre in eo, (piod alii siphones (marginales gemini) 

 latiores adparent, alii angustiores (qui nempe paginas occupant), 2—3 in utraque 

 pagina; omnes longitudine a'quales. Formas corticatas, quales has inilii hodie 

 cognitas habco, speciem Rliodomelfp, comjdanatam angustam et subdistichc pin- 

 natam, referre fere dieerem. Ut speeies j)olysiphonea' vi\ nisi in apicc siiiMvmo 

 monosipbonea- ailpareant; ita corticata- vix nisi in supremo a])ice articulato mo- 

 nosiphones'. 



