Ser. RuoDOSPERMEiE. Fani. Rhochjmeuiacete. 



Plate CXCIX. 



RIIODOPHYLLIS? HYPNEOIDES, iiarv. 



Gen. Char. Frond flat, membranous, dichotomously or pinnately decom- 

 pound, mostly margined \\'\i\\ leafy or slender processes, and com- 

 posed of two strata of cells ; the medullary stratum formed of roundish- 

 angular cells, the cortical of coloured cellules in one or few rows. 

 Fructification: 1, marginal, external conceptacles, containing within 

 a pericarp formed of radiating filaments, a compound nucleus, formed 

 of bundles of spore-threads radiating from a basal (or central) pla- 

 centa; 2, zonate tetraspores, immersed in the peripheric cells of the 

 segments or marginal processes. — Ehodophyllis {Kiltz.), from poSeo<;, 

 red, and tpvXXov, a leaf. 



Frons plana, memhranacea, dicJiotome v. pinnatim decomposita, segmentisque 

 ciliisve marginaUbus ohsita, stralis duohns contexta ; strata medidlari cellulis 

 rotundato-angulatls, corticali cellulis color atis uni- v. pauci-seriatls composito. 

 Friict. : 1, cystocarpia marginalia, externa, pericarpio filis vioniliformihns 

 radiantibns covfiato viunita, nucleuvi, compositmn ex J'ascicidis filornm radian- 

 tium formatum foventia ; filis demmn in sporas solutis ; 2, tetrasporce zonatim 

 divis(£,fronde v. lachndis marginalihus immerses. 



Rhodophyllis ? hypneoides ; frond broadly linear, subdistichously much 

 branched, decompound pinnate; larger branches setigerous on the 

 disc, closely bi-tripinnate, pinnas and pinnulfe slender, patent, subu- 

 late, acute, sometimes thickened at the apex and hookpointed ; cysto- 

 carps globose, inflated, sessile on the sides of the pinnules. 



R. hypneoides ; fronde lato-lineari plana subdistiche ramosissima decomposite 

 pimiata ; ramis majoribns applanatis disco seticulosis crebre bi-tripimiatis ; 

 pinnis pinnulisque gracilibus patentibus subidatis acutis nunc apice incrassatis 

 cirrhato-liamatis ; cystocarpiis globosis infiatis ad latera pinnularmn sessilibus. 



Hypnea planicaulis, Earv. Alg. Exsic. Amtr. n. 342 ; Ft. Tasm- v. 2. />. 315. 



Hab. Western Port, Victoria, W. H. H. Georgetown, Tasmania, IF. U. 11. 



Geogk. Distr. South coasts of Australia. Tasmania. 



Desck. Root partly fibrous and clasping. Frond Aea^dy tufted, 6-8-12 inches 

 long, 4-8 in the expansion of the branches, decompound pinnate, the main 

 rachis 2-4 lines wide, those of the primary pinnie 1-1^ line wide, all the 

 lesser pinnules and their marginal processes very slender, filiform o^ capil- 

 lary. The primary pinnrE are sometimes numerous, set at regular intervals 

 of half to one inch, sometimes few and very irregularly placed, they are 

 narrowed upwards and taper to a slender point : throughout their whole 

 Icngtli they arc closely set with slender pinnules, which are simple in the 



