brandi. The ramMli are rerj' robust, sparingly or copiously ilivided, the tips of their divisions mucronate. Substance
rather rigid. Colour a deep red.
13. Callithamnion elongatum (Harv.); frondibus fusco-purpureis dense cæspitosis basi intertextis
longissimis setaceis e basi pellucide articulatis dichotome compositis et ramis alternis obsitis, ramis minoribus
seeunde alterne v. dichotome ramosis versus apicem ramulos crebre dicliotomos ferentibus, articulis
superioribus diametro 4-5-plo longioribus, inferioribus longioribus, tetrasporis triangule divisis ad genicula
ramulorum fasciculatis breve pedicellatis, favellis versus apices ramulorum solitariis.—Harv. Alg. Austr.
Exsic. 11. 534.
H a b . Georgetown, not uncommon.
D is t iu b . South coast o f Australia.
Fronds in large bundled tufts, often upwards of a foot in length, setaceous, not much attenuated upwards, the
principal stems towards the base twisted round each other into ropes, whicli strengtlien the tuft. The whole branching
is on a dichotomous type, hut by suppression, it is very irregular, a compound of the alternate, secund, and
dichotomous. The penultimate divisions throw off from their sides short, multifid, or regularly dichotomous ramuli,
which bear fructification of both kinds, on different individuals. The favella are usually solitary ; the tetraspores
several together, tufted or somewhat whoried round the nodes of the ramuU. Colour a dark brownish-piuple, sometimes
rather brighter. Substance somewhat gelatinous, but firm, like that of Gi'iffiihsia setacea.
14. Callithamnion Griffithsioides (Sond.); cæspitosum,coccineum,frondibusbasiintcrtextissetaceis
pellucide articulatis dichotomis fastigiatis, ramis pluries furcatis, axillis acutis versus apicem ramulos
minutos multifidos ferentibus, ramulis crebre ramulosis fere corymbosis fructiferis, tetrasporis prope apices
ramulorum fasciculatis pedicellatis, articulis cylindraceis diametro 6 - 8 -plo longioribus.— C. Griffitlisiæ,
Harv. Alg. Auslr. Exsic. n. 535.
H a b . Georgetown, rare, Gunn.
D is t r ib . Port Pliillip, D. Mueller, JF. H. II.
Tufts dense, 4-5 inches long, fastigiate, bright-crimson, in habit resembling tbose of Griffithsia setacea. The
branching is pretty regularly dichotomous, the forks rather distant, and the branches and thefr dirisions consequently
naked, except at the extremity, where the branch (of fertUe specimens) ends in a minute, corymbose, multifid ramii-
lus that beai-s the tetraspores.—The species is nearly related to the preceding, but I tliink distiuct.
15. Callithamniou fastigiatum (Harv.); fronde pellucide articulata (1-2-unciaIi) sursum attenuata
decomposita dichotome fastigiata, ramis repetite furcatis erecto-patcntibus, ramulis ultimis ad genicula
minute spinulosis v. gemmiferis, articulis omnibus diametro sub-4-plo longioribus, favellis subbinis
nudis ad axillas ramorum, tetrasporis cruciatim divisis ad genicula ramulorum sessilibus sæpe oppositis
nunc solitariis uunc 2-3-fasciculatis.
H a b . Georgetown, Gunn.
Frond very slender, 1-2 inches high, flabelliform and nearly regularly dichotomous aud fastigiate, rose-red.
The nodes of the upper or ultimate ramuli are generally furnished with rhinute, bud-like or somewhat spinous processes,
which perhaps aftenvards develope into tetraspores. The tetraspores are oval, and ci'uciately divided.—In
habit this somewhat resembles Ceramium fastigiatum, but in softness of substance, ramification, etc., it has more the
character of a very slender Griffithsia.
16. Callithamnion botryocarpnm (Harv.) ; nanum, penicillato-cæspitosum, fronde minuta (1-2
lineas alta) e basi ramosissima, ramis alternis v. secundis patentibus flexuosis nunc subsquarrosis, articulis
diametro 4-plo longioribus, tetrasporis magnis triangule divisis in glomerula ad axillas ramorum densissime
Ì evolutis.—Harv.is, antheridiis botryoideis e quoque fere articulo ramorum s in Trans. Ii. I.
Acai. xxii. i?. 563.
H a b . Parasitic on Alga. Piper’s River, Gunn.
D is t r ib . King George’s Sound, on Chorda lomentaria, JF.H.H.
Allied to the British C. Daviesii, C. virgatulum, etc.
17. Callithamnion ? paradoxum (Harv.); fronde spongiosa quaquaversum ramosa in totum e
filis radicantibus densissime intertextis conflata ambitu pyramidali, ramis lateralibus densissime tomentosis
simplicibus v. iterum lateraliter compositis, ramulis (quasi villum ramorum) brevibus pinnatis, pinnis
alternis paucis longissimis flexuosis obtusis, articulis pinnularum diametro subtriplo longioribus, tetrasporis
ad latera pinnularum sessilibus solitariis.
H a b . Brown’s River, Gunn.
Spongy frond 6 -8 inches long, with a pyramidal outline, alternately branched, the branches simple or again
laterally compounded, spreadmg to all sides. There does not appear to be any central filament or axis (possibly it
may have perished), but the branches are composed of slender rooting filaments, densely woven together into a
spongy rope (much as in Ectocarpus tomentosus), and these throw off a periphery of subhorizontal, pinnate ramuli,
1-2 lines long, which give the surface of the compound fi'ond a shaggy or wooUy appearance. These ramuli are
once pinnated, the pinnæ few, curved, and alteraating on the short rachis. Tetraspores are borne on the sides of the
pinnæ, as in others of the genus.—As yet I have seen but few specimens of this anomalous plant, and these not in
good order ; but I have no hesitation in admitting it, whether to this genus or uot, as a distinctly marked species.
Series I I I . CHLOROSPERMEÆ.
T ribe I. SIPIIONEÆ.
Gen. CXV. CAULERPA, Lamour.
(Lamour. An. Mus. xx. p. 282. Ag. Sp. AJg. i. p. 433. Kiitz. Sp. AJg. p. 495.)
1. Caulerpa hypnoides (Ag. Sp. Alg. i. p. 4 4 3 ; Sond. PI. Preis. ii. p. 150; Kiitz. Sp. Alg.
p. 497).—Fucus hypnoides. Turn. t. 173.
H a b . Georgetown, not uiicommou.
D is t r ib . Australia aud New Zealand.
2. Caulerpa obscura (Sond. PI. Preis. ii. p. 150; Kiitz. Sp. AJg. p. 497).
H a b . Tasmania, Gunn. (A single specimen.)
D is t r ib . Found all along the coast of Australia, from Swan Eiver to Western Port, Victoria.
The ramenta, described by Souder as “ quadrifarious,” are not constantly so. In the more luxuriant specimens
they arc generally distichous. I have not seen specimens of Grevüle’s C. siiperba from Bass’s Straits, but the figure
given is not unlike some of the laxer states of C. obscura.
3. Caulerpa furcifolia (Hook. fll. et Harv. Lond. Journ. vi. p. 4 1 6 ; Fl. N. Zeal. ii. p. 260.
t. 121 B).
H a b . Common at Georgetown.
D is t r ib . Australia.
4. Caulerpa B rown ii (Endl.; Hook. fil. et Harv. Fl. N. Zeal. ii. p. 260. t. 121 A ).
H a b . Port Arthur.
D is t r ib . New Holland and New Zealand.
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