Ser. RuoposPeERME. Fam. Ceramiacee 
Pilar COLL X XI: 
CALLITHAMNION FORMOSUM, Zarv. 
Guy. Cuar. 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, favelle generally 
in pairs, axillary or sessile on the branches, naked, containing nume- 
rous angular spores; 2, ¢e¢raspores naked, sessile or pedicellate, dis- 
tributed on the ramuli, generally triangularly parted. —CaLLirHaMNION 
(Lyngh.), from Kadrus, beautiful, and Oapoy, a little shrub. 
Frons filiformis, ramosa, articulata, monosiphonia, caule ramisque majoribus 
(in pluribus) demum fibris decurrentibus interne vel externe evolutis corticatis 
v. firmatis ; ramulis semper pellucide articulatis. Fruct.: 1, favelle binate, 
axillares v. ad ramos sessiles, nude, sporas numerosas angulatas foventes ; 2, 
tetraspore nude, ad ramulos sessiles v. pedicellate, triangule v. cruciatim 
divise. 
CantitHAMNion formosum; frond slender, elongate, distichous, decom- 
pound-pinnate, all the divisions alternate ; stem and primary branches 
‘opaque, corticated and minutely hispid; penultimate branches (p/u- 
mules) about tripinnate, lanceolate ; pinnee erecto-patent, their articu- 
lations about twice as long as broad; tetraspores solitary, below the 
tips of the ultimate pinnules. 
C. formosum ; fronde setacea elongata disticha decomposite pinnata alterne di 
visa; caule ramisque primariis opacis corticatis hispidulis, plumulis subtri- 
pinnatis, pinnis erecto-patentibus, earum articulis diametro 2-3-plo longiori- 
bus ; tetrasporis infra apicem pinnularum solitariis, sessilibus. 
CALLITHAMNION formosum, Harv. Alg. Austr. Exsic. n. 515. 
Has. Port Philip Heads, W. HH. H. 
Grocr. Distr. South coast of Australia. 
Descr. Root asmall disc. Frond 6-8 inches long, and as much in the exten- 
sion of the branches, distichous, alternately decompound, many times pin- 
nate, feathery. Stem setaceous below, capillary above, alternately branched ; 
both stem and branches opaque, coated with two or three rows of small 
cellules, and covered with short, patent, jointed hairs. Branches lanceolate 
in outline, alternately plumulate. Plumules also lanceolate, pellucidly arti- 
culate, about thrice pinnate, the pinnee and pinnules erecto-patent, alternate. 
