Scr. RHODOSPERMEiE. Fam. Qryptonemiacem. 



Plate X. 



CHRYSYMENIA OBOVATA, Send. 



Gen. Char. Frond subterete or plano-coinpressed, tubular (or with a solid 

 branching stem), branched; the tube empty or with percurrent fila- 

 ments; peripheric stratum composed internally of large, roundish- 

 angular, inflated cells, externally of minute, coloured, vertically seri- 

 ated cellules. Conceptacles half-immersed in the frond, hemispherical 

 or conical, containing a simple nucleus [favella) fixed to a basal pla- 

 centa, surrounded by anastomosing filaments, and consisting of very 

 numerous, densely packed, minute spores, enclosed in a membrane. 

 Tetraspores cruciate, scattered among the superficial cells of the peri- 

 phery. — Chrysymenia (/. Ag.), from ^pvaos, gold, and v/jltjv, a mem- 

 brane. 



Frons teretluscula v. plano-compressa, tubulosa (interdum caide solldo donalaj, 

 ramosa ; fills paucis v. nurnerosls tubum percurrentibus ; strata peripherico 

 duplici, cellidis interlorlbus rotundato-angulatls vacuis, exterlorlbus minutis 

 coloratis vertlcaliter seriatis. Cystocarpia semi-immersa, hemisphcerica v. 

 coulca, ostiolo pertusa, favellavi ad placentam basalem ajfixam fills anastomo- 

 santibus clrcumdatam foventia. Tetrasporce cruclatlm dlvlsa, sparsce. 



Chrysymenia obovata ; frond filiform, solid, irregularly dichotomous ; the 

 branches set with obovate, crowded, bag-like, horny-membranous ra- 

 muli; conceptacles hemispherical. 



Ch. obovata; fronde fillforml solida, vage dlcliotoma; ramulls obovoideis comeo- 

 membranaceis undlque dense insertls sparslsve prhno sncco repletls demum 

 aplce apertls et vacuis ; cystocarplls liemlsplicerlcis. 



Chrysymenia obovata, Sond. Alg. Prelss. v. 2. p. 176. Harv. Net: Amir. 

 p. 77. Harv. Alg. Exslc. Austr. n. 429. 



Gastroclonidm obovatum, Kiitz. Sp. Alg. p. 865. 



Chondria uvaria, var. obovata, Ag. Sp. Alg. p. 248. 



Gigartina ovata, Lamour. Ess. p. 48. t. 4./. 7. 



Rhabdonta? globifera, J. Ag. Sp. Alg. v. 2. p. 355. 



Fucus globiferus, Lamour. in Herb. Mm. Par. (fide J. Ag.) 



Hab. Western and southern shores of Australia, abundantly. In fruit at 

 Carnac, Western Australia, Mr. Clifton. Common in the Tainar, 

 above Georgetown, Tasmania, W. 11. H. 



Geogr. Distr. As above. 



Descr. Root discoid. Fronds densely tufted, 3-8 inches long. Stem filiform, 



