Ser. RuoposrpekRMEA. Fam. Ceramiacer. 
Puate CCLXXXV. 
CALLITHAMNION PLUMIGERUM, Zarv. 
Gen. 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. ructification: 1, favelle generally 
in pairs, axillary or sessile on the branches, naked, containing nume- 
rous angular spores; 2, ¢eéraspores naked, sessile or pedicellate, dis- 
tributed on the ramuli, generally triangularly parted.—CaLLirHaMNION 
(Lyngb.), from xarrs, beautiful, and Oapvov, 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, 
avillares v. ad ramos sessiles, nude, sporas numerosas angulatas foventes ; 2, 
tetraspore nude, ad ramulos sessiles v. pedicellate, triangule v. eruciatim di- 
vise. 
CaLLITHAMNION plumigerum ; frond rose-red, spongy, triply or quadruply 
pinnate, the pinnz and pinnules densely covered with interwoven, 
articulated, longitudinal filaments, and hairy with minute, subsimple 
‘or forked ramelli; ultimate ramuli (or very young pinnules) free (not 
spongy), alternately plumulate; plumules minute, pinnato-multifid ; 
favellee in pairs, involucrate, sessile; tetraspores globose, secund on 
the divisions of the plumules. 
C. plumigerum ; fronde rosea spongiosa 3—4-pinnata, pinnis pinnulisque filis 
longitudinalibus intertextis articulatis densissime velatis, et etiam ramellis 
minimis subramosis undique onustis quasi hirsutis, ramulis (v. pinnulis) juni- 
oribus liberis (non spongiosis) alterne plumulatis, plumulis minutis pinnato- 
multifidis ; favellis binatis involucratis sessilibus ; tetrasporis globosis ad pin- 
nulas plumularum secundis sessilibus. 
CALLITHAMNION (Dasythamnion) plumigerum, Harv. Aly. Austr. Eusicc. n. 
507. 
Has. Cape Liptrap, Dr. F. Mueller. Port Fairy and Western Port, 
W.H.#H. Cape Shank, Mrs. Barker. 
Geoar. Distr. South Coast of Australia. 
Descr. Root covered with woolly fibres. Frond 3-4 times pinnated, of a soft, 
spongy texture, the primary, secondary, and tertiary pinne externally clothed 
with minute, horizontal, subsimple or alternately branched, jointed ais or 
ramelli. These hairs spring from numerous longitudinal interwoven fila- 
ments, enclosing, as in a sheath, the proper or primary filamentous frond, 
which runs as a jointed axis through every portion of the spongy branches, 
