Ser. Rhodospermej;. lam. Ceramiacea. 



Plate CLX. 

 CALLITHAMNIONGRIFFITHSIOIDES,^o/.^. 



Gen. Char. Frond filiform, branched, articulated, monosiphonous, the stem 

 and branches (in many species) at length thickened internally, or 

 coated externally with decurrent filaments ; ramuli always pellucidly 

 articulate and monosiphonous. Fructification : 1, favella generally 

 in pairs, axillary or sessile on the branches, naked, containing nume- 

 rous angular spores ; 2, tetraspores naked, sessile or pedicellate, dis- 

 tributed on the ramuli, generally triangularly parted. — Ca.llithamnion 

 [Lyngh.), from KaXKi<i, heautiful, and Oafjuviov, a little shrub. 



Frons fUformis, ramosa, articulata, monosipJionia, caule ramisque majoribus 

 (in pluribus) demum Jibris decurrentibus interne vel externe evolutis corticatis 

 V. Jirmatis ; ramulis semper pellucide articulalis. Fruct.: \,favell(e binatce, 

 axillares v. ad ramos sessiles, nudre, sporas mimerosas angidatas fuventes ; 3, 

 tetrasporce nudce, ad ramulos sessiles v. pedicellate, triangulce v. cruciatim di- 

 vis(E. 



Callithamnion Griffithsioicles ; densely tufted, bright rosy-red; fronds 

 interwoven at base, setaceous, pellucidly articulate, dichotomous, fas- 

 tigiate ; branches several times forked with acute axils, bearing to- 

 wards the apex minute, multifid ramuli ; ramuli closely branched, 

 nearly corymbose, fruit-bearing ; tetraspores pedicellate, near the ends 

 of the ramuli ; articulations cylindrical, 6-8 times as long as broad. 



C. Griffitlisioides ; caspitosiim, coccineum ; frondibus basi intertextis setaceis 

 pellucide articulatis dichotomis fastigiatis; ramis pluries furcatis (axillis 

 acutis), apicem versus ramulos minntos muUiJidos ferentibus ; ramulis crebre 

 ramulosis fere corymbosis fructiferis ; tetrasporis prope apices ramulorum fas- 

 ciculatis pedicellatis, articulis cglindraceis diametro &-8-plo longioribus. 



Callithamnion Griffitbsioides, Sand, in Linn. v. 36. p. 513. Harv. in Hook. 

 Jil. Fl. Tasm. v. 3. p. 336. 



Callithamnion Griffithsise, Harv. Alg. Austr. Exsic. n. 535. 



Hab. Wilson's Promontory, 1853, Lr. Ferd. Mtteller. Port Fairy, 1854, 



W. H. H. Georgetown, Tasmania, 1848, R. Gunn. 

 Geogr. Distr. South coast of New Holland. Tasmania. 



Descr. Root an entangled mass of creeping fibres. Filamei^ts as thick as hog's 

 bristle, densely tufted, 3-5 inches long, pellucidly articulated from the base, 

 many times regularly forked, spreading equally, and nearly fastigiate. All 

 the divisions of the frond are very erect, and the angles acute ; each fork of 

 the larger branches is 4-8 lines apart. In barren specimens the terminal 



