Ser. RaoDOSPEttMEji. Fam. Cryptonemiacece. 



Plate CCXIV. 



HALYMENIA FLORESIA, Jy 



Gen. Char. Frond terete, compressed or flat, gelatinoso-membranaceous, 

 dichotomous or piunatifid, composed of two strata; the medullary 

 stratum formed of a few, laxly interlaced, branching filaments, lying 

 in gelatine; the cortical membranous, formed of minute, coloured 

 cellules. Fructification : 1, favellce immersed in the frond, sus- 

 pended under the peripheric stratum ; 2, cruciate tetrasjwres, scattered 

 through the surface-cellules. — Halymenia {Ag.), from aX?, the sea, 

 and vfJ-vv, a membrane. 



From teres, compressa v. plana, gelatinoso-memiranacea, dicJwtoma v. vage 

 pinnatifida, stratis duobiis composita ; strata medullari ex fills paucis laxe m- 

 trlcatls ramosls succo gelatlnoso Immersls, perlplierlco menibranaceo cellulls 

 minutls color alls for mato. Fruct.: \, favellce frond I ImmerscB, Infra stratum 

 perlpliericurn suspenses ; 2, tetrasporcB sparsce, cruclatlui dlvlsce. 



Halyiienia Floresla ; frond softly membranous and slippery, flat, stipitate, 

 elongate, pinnately decompound ; the pinnse and pinnules broadly 

 linear or oblong, acuminate, spreading, either entire or serrato-lacerate 

 and ciliate. 



H. Floresia ; fronde gelatlnoso-membranacea plana stlpltata elongata plnnatim 

 decomposita ; pintils pinnullsque lato-llnearlbus v. ohlongls acumlnatls paten- 

 tlbus integrls v. sceplus serrato-laceratls clllatlsve. 



Halymenia Floresia, Jg. S. Alg. p. 209; Syst. p. 243. /. Ag. Alg. Medlt. 

 p. 96. Mont. Canar. p. 163; Fl. Alg. p. 114. Kiltz. Sp. Alg. p. 716. 

 /. Ag. Sp. Alg. v. 2. p. 205. Harv. Ner. Bor. Amer. Part 2. p. 193 ; Austr. 

 Exslc. n. 435. 



Fucus Floresius, Cleriiente. Turn. Hist. t. 256. 



Fucus Proteus, Bel. Egypt. ^. 58./. 1-4. 



Hab. South Beach, Fremantle and Garden Island, G. Clifton, IF. H. H. 

 Port PhiUip Heads, W. H. H. 



Geogr. Distr. Mediterranean Sea. Xorth-west coast of Africa. Canary 

 Islands. Ked Sea. Gulf of Mexico. Carthagena, New Granada, Schott ! 

 Port Natal, South Africa, Sanderson ! 



Descr. Root a minute disc. Frond rising with a slender, compressed, linear 

 stipes, that soon becomes cuneiform, and gradually passes into the base of 

 a broadly Unear principal lamina, 6-12 or 18 inches long, and i-f or \\ 

 inches wide. This principal lamina or racbis is either simple or forked, or 

 multifid, and is set throughout with approximate or subdistant lateral 

 brauches or piunse, which are furnished with a second or third series of 



