j\ oT ae 
Ser. RHODOSPERMEA. Fam. Ceramiacea. 
Puate CCLVI. 
CROUANIA AGARDHIANA, Zarv. 
Gen. Caar. Frond nodoso-articulate, alternately decompound, consisting 
of an articulate, monosiphonous, primary filament (or aa7s) emitting 
at the nodes densely whorled, minute, dichotomo-fastigiate, free, arti- 
culated ramelli. Fructification: 1, solitary subterminal, faved/a, sur- 
rounded by ramelli; 2, external triangularly-parted ¢e¢raspores, borne 
on the ramelli.i—Crovania (J. Ag.), in honour of the brothers Crouan, 
of Brest, celebrated among French Phycologists. 
Frons nodoso-articulata, alterne decomposita, ¢ filo primario (axi) monosiphonio 
articulato ramellos minutissimos dicholomo-fastigiatos articulatos verticillatos 
ex nodis emittente constituta. Fruct.: 1, favelle sublerminales, solitarie, 
inter ramellos abscondite ; 2, tetraspore triangule aut transversim divise, ad 
ramellos lateraliter affive. 
Cxovanta dgardhiana ; frond cartilaginous (6-8 inches long), thickly cor- 
ticated throughout, opaque, decompoundly much branched ; branches 
and ramuli alternate or scattered, repeatedly divided, very patent, 
whorled at the nodes with minute, dichotomo-multifid, 4-ranked, arti- 
culated obtuse ramelli; articulations of the ramelli 2-3 times as long 
as broad ; favellee quaternate, at the apices of short branches. 
C. Agardhiana ; fronde cartilaginea (6-8-unciali) strato cellularum crasso-cor- 
ticata opaca decomposite ramosissima ; ramis ramulisque alternis v. sparsis 
repetite divisis patentissimis ad genicula verticillatim ramellosis, ramellis 
minutis articulatis tetrastichis dichotomo-multifidis obtusis, articulis ramel- 
lorum diametro 2-3-plo longioribus ; favellis quaternis ramos breves coro- 
nantibus. 
Crovanta Agardhiana, Harv. Aly. Austr. Exsic. n. 487. 
WranGeuia? Agardhiana, Harv. in Trans. R. I. Acad. v. 22. p. 545. 
Has. King George’s Sound, VW. H. H. 
GeoGR. Distr. South-west coast of New Holland. 
Descr. Root a small dise. Frond 6-8 inches long, as thick as how’s bristle, 
coated in all parts with a layer of peripheric cells, which in the younger 
parts are in a single row, in the older in 3-4 rows, surrounding the mono- 
siphonous articulated axial tube.. The frond is deeompoundly much branched 
in an alternate or irregular manner, the branches and ramuli directed to all 
sides and spreading at very wide angles, the lesser ones divaricating ; the 
ultimate ones very short, and either opposite or quaternate. The internodes 
throughout the frond are about ]4-twice as long as broad. The nodes are 
