388 RnoDYMEMEf. RhodophylUs. 



doplnlli stratum, exterius magis ovoliitum cellulis fero discoideis 

 radiulim disposilis contoxtuin cst. l-'ila gemmidiifera in Callible- 

 phari invicem libera, gemmidia in articulis doniuni subsingula, plura 

 Jongitndinaliter seriala, fovent. In lihodopbylli articuli superiores 

 iilonim gemmidia generant numcrosa, repetita et irregular! divisione 

 endochromatis orta; gemmidia iUxjue minus conspicne seriata, po- 

 lius fascicules constituunt plures a placenta radiantes. Ilac struclura 

 Cystocarpii Rhodopliyllis ad Kuthoram propius accedit. 



\. Sphterosporis segment a frondis occupantibus. 



\. RH. BIFIDA (Good, et Woodw. Lin. Trans, p. 159 tab. 47 f. 1) 

 fronde decomposita dichotoma suhflabellafa, segmenlis linoaribus 

 cuneatisve, raargine nudis s?cpe conglutinatis, tcrminalibus ob- 

 tusis, cystocarpiis submarginalibus, splia3rosporis ad apices seg- 

 mentortiiu sparsis. 



Fucus bifidus Good, et Woodw. 1. c. EngL Bot. tab. 773. Turn. Hist. 

 Fuc. tab. '154! 



Rhodophyllis bifida Kiilz. Bot. Zeit. 1847 p. 23! Sp. Alj. p. 786! 



Sphaer. bifidus Ag. Sp. A!<j. p. 209! Syst. p. 231! 



Rhodomenia bilida Grev. Alg. Dr. p. 85! Harv. Man. p. GO. P/iycol. 

 tab. XXXII\ (exclus. variet.) Mont. Voy. Pol. Slid. p. I5G. Ft. Alg. p. 67! 

 Aresch. En. p. 77. 



Exsicc. Wyalt Danm. n:o G6. Chaiiv. Norm. n. 19! 



Ilab. in mari Allantico ab oris Scandinavia; usque ad Cades; 

 in mediterraneo ad oras Gallia?! in adriatico! in pacilico et austral! 

 (sec. Montagne). 



Frons plerumque vix ultra bipollicaris, a radice vix discernenda 

 globoso-csespitosa, portibus expansis plus minus tlaliellatis. lamina mine 

 infernc latissima cuneata subindivisa, nunc et sacpius a basi decomposita 

 dichotoma, segmentis fastigiatis aut sa^pe alternis brevioribus distiche 

 ramosa. Segmenta linearia 2 3 lineas lala, aut leviter cuneata, aut la- 

 tissima, fere pollicem lala, terminalia rotundata obtusa aut fere truncat;i 

 aut emarginata. -Margines integerrimae, nunc segmentis conformibus obsito?, 

 sa-pe conglutinatao et concrcscentes ita ut difticilius expliccntur frondes. 

 Cystocarpia spba'ric.a margincs ornant, rarius nonnulla a marginc dissita 

 plurimis marginalibus. Sphrcrosporrc sparsai in segmentis superioribus. 

 Color coccineus, rarius purpurascens. Substantia tenuissima membranacea, 

 aut aliquando lirmior et chartae vix adhacrens. 



Species mirum in inodiim forma varians, situ tamen fructuum facile 

 cognoscenda. Formas, quas var. f}. ciliatam et y. incrassatam denomi- 

 navit Harvey, ad aliam specicm refero. 



