Ser. Rhodosperme^. Fam. CryptonemiacecB. 



Plate CIII. 



HALYMENIA? CLIFTONI, Haw, 



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

 dichotomous or pinnatifid, 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: \, favella immersed in the frond, sus- 

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

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

 and v^r}v, a membrane. 



Frons teres, compressa v. plana, gelatlnoso-memhranacea, dlcliotoma v. vage 

 piiDiafifida, stratis duohus composita ; strata medullari ex fills paucis laxe in- 

 tricatls ramosis succo gelatinoso immersis, peripherico membranaceo celluUs 

 minutls color atls for mato. Friict. : \,favellce frondi immersee, infra stratum, 

 periphericum siispensce ; 2, tetrasporce sparsce, cruciatim dlvisce. 



Halymenia Cliftoni ; frond flat, delicately gelatinoso-membranaceous, 

 rose-red, expanded and leaf-like, of no definite shape, variously lobed 

 and sinuate ; the margin undulate ; segments subacute ; favellse dis- 

 persed. 



H. Cliftoni ; fronde plana tenuiter gelatinoso-memhranacea rosea latissima foli- 

 acea varie lobata et sinuata ; margine undulato nunc mlmite glanduUfero ; 

 favellis per totam frondem sparsis. 



Halymenia Kallymenioides, Harv. in Trans. R. I. Acad. v. I^.p. 556. n. 

 357. 



Hab. Cast ashore at Fremantle, rare, W. H. H. Garden Island, G. 



Clifton. 



Geogr. Distr. Western Australia. 



Descr. Root a small disc. Frond sessile, cuneate at base, quickly expanding 

 into a leaf-like lamina, 6-8 inches in length, and 4—5 in breadth. This 

 lamina is j of no definite shape ; sometimes it is nearly or quite simple, 

 sometimes cut round the edges into numerous shallow lobes, and some- 

 times deeply parted into many oblong segments. The margin is either 

 flattish or undulated, and either quite entire or minutely set with glandu- 

 lar projections ; these are scarcely visible without a lens. The favellce are 

 minute, dispersed over the whole surface, and very numerous on the fertile 

 frond. The peripheric stratum differs in thickness in different individuals, 

 being sometimes composed of one or two, sometimes of three or four rows 

 of cellules; a corresponding variation occurs in the medullary filaments. 

 The colour is a delicate but brUhant rose-red, fading to yellowish or 



