Gen. CXI. GRIFFITHSIA, Ag.
(Ag. Sp. AJg. ii. p. 126. J. Ag. Sp. Alg. ii. p. 75. Kiitz. Sp. Alg. p. 659.)
1. G r i f f i t h s i a c o r a U in a (Ag. S p t. p. 145 ; J. Ag. Sp. Alg. ii. p. 79 ; Hatv. Phyc. Brit. t. 214).
—G. flabclliformis, Harv. Lond. Journ. iii. p. 450.
Hab. In the Tamar, common.
D is t k ib . Native of northern hemisphere.
2. Griffithsia antárc tica (Hook. fil. et Harv. Fl. Ant. ii. p. 488 ; J . Ag. Sp. Alg. ii. p. 87 ; Fl.
N. Zeal. ii. p. 258).
H ab. Brown’s River, Gunn. Georgetown (a variety?), TF. H. H.
D istbib. Falkland Islands, Cape Horn, aud New Zealand.
3. Griffithsia mon ilis (Harv.) ; fronde basi radicante cæspitosa dichotoma fastigiata crassissima,
segmentis erecto-pateutibus, articnlis diametro sesquilongioribus globoso-infiatis siccitate coUapsis et ovalibus
ad genicula maxime eonstrictis, fertiiibus conformibus, involucris tetrasporarum circa genicula verticillatis.—
Harv. in Trans. R. I- Acad. xxii. y?. 559. (T a b . CXCV. B )
H ab. Parasitical on Algoe, at Georgetown, Gunn.
D ist iu b. West and south coasts of New Holland.
1, whose branches resemble strings of ruby-coloured beads. The colour is very quickly
discharged.—P la t e CXCV. B. Fig. 1, fronds, nat. m e ; 2, tip of a branch, bearing faveUæ ; 3, a tip, bearing
sorus of tetraspores ; 4, tetraspores from the same :—the latter figures magnified.
4. Griffithsia se ta c ea (Ag. ; J . Ag. Sp. Alg. ii. p. 84; Kiitz. Sp. Alg. p. 6 6 0 ; Harv. Phyc. Brit,
t. 184).
H ab. Georgetown, common.
D ist e ib . Native of northern hemisphere.
All the specimens we have seen are barren; the species therefore cannot be ascertained with certainty.
5. Griffithsia? g ra c ilis (Harv.); frondibus capillaribus sursum attenuatis araclmoideis dichotomis
fastigiatis, ramulis minoribus sæpe secundis, axillis patentibus, articulis cylindraceis diametro multiplo-lon-
gioribus, apicibus obtusis.
H ab. Georgetown, TF. H. H.
Fronds 2-3 inches high, very slender, and much attenuated to the apex, pretty regularly dichotomous and fastigiate,
forming flabelliform tufts. Articulations very long, cylindrical. Colour a bright rosy-red, instantly given
out in fresh-water. Substance soft.—Very few specimens have yet been seen, and these without fructification. The
species therefore wants further confirmation.
Gen. CXII. BALLIA, Harv.
(Harv. in Hook. Lond. Journ. ii. p. 191. J. Ag. Sp. Alg. ii. p. 74. Kiitz. Sp. Alg. 663.)
1. BaUia caUitricha (Mont. Voy. Pol. Sud, p. 94; Kütz. Sp. Alg. p. 663; J . Ag. Sp. Alg. ii.
p. 75 ; Fl. N. Zeal. ii. p. 257).—B. Brunonis, Harv. Lond. Journ. ii. p . 191. /. 9. B. Horabroniana,
Mont. Pol. Sud, t. 12. / . 1. Sphacelaria callitricha, Ag. Sp. Alg. ii. p . 23 ; Ic. Alg. Eur. t. 6 .
H ab. Various parts of the coast.
D istb ib. All through the Southern Ocean.
2. B a llia Robertiana (Harv.) ; ramis minoribus raehidibusqne pinnularum cylindraceis (nec ad
genicula eonstrictis) distiche plumulatis, plumulis incurvis oblongis oppositis inter se alterne inæqualibus.
una pusilla pinnata vel vage multifida pinnulis inflexis, altera elongata bipinnata basi ramulis incurvis vage
divisis fructiferis stipata, pinnis ambitu ovatis, pinnulis oppositis incurvis creberrimis.— ATari?. in Ann. Nat.
Hist. XV. p. 832 ; Phgc. Austr. t. 36.
H ab. Southport, C. Sluart.
D istuib. Coast of Victoria, at Port Fairy.
3. B a llia scop arla (Harv. Alg. Exsic. Austr. n.502).—Callithamnion scoparium, Hooh. fil. et Ilarv.
Fl. A n t. i l p . 490. t. 1 8 9 . / 3 ; J. Ag. Sp. Alg. \x.p. 35.
H ab. Mouth of the Tamar, and at Port Arthur.
D istb ib. Antarctic Ocean.
Gen. CXIII. CORYNESPORA, / . Ag.
(J. Ag. Sp. Alg. ii. p. 69.)
1. Corjmespora arachnoidea (Harv.); fronde tenuissima arachnoidea (2-8-unciali) e basi dicho-
tomc decomposita ramis lateralibus pluries furcatis obsita, axillis acutis, ramulis ad genicula subcontractis,
apicibus cylindraceis attenuatis obtusis, articulis longissimis, tetrasporis ovalibus grumosis pedicellatis.
H ab. Georgetown, W. H. H.
Two to three iuches liigh, densely tufted. Filaments excessively slender, iieaj-Iy of one diameter throughout,
except in the ultimate divisions, many times dichotomous, the lateral dichotomies not always regular, and then as
if set with alternate dichotomous branches. The arliculations in all parts of the plant arc of great length. The
colour is rosc-red. Tctraspores ? (or qm-es) pedicellate, oval, containing a granular mass, not divided into sporules.
—It is difficult to examine this plant after having been ouce dried, as it will not bear remoistening with fresh-water,
and adheres so strongly to paper that it is impossible to separate it without breaking.
Gen. CXIV. CALLITHAMNION, Lijngb.
{L}mgb. Hyd. Dan. p. 122. J. Ag. Sp. Alg. ii. p. 5. ITarv. Phyc. Brit, etc.)
1. Callithammott comosum (Harv. Lond. Journ. Bot. iii. p. 451).
H ab. In the Tamar, above Georgetown, abundant.
2. Callithamnion Plumula (Ag.; Harv. Pbyc. Brit. t. 2 4 2 ; J . Ag. Sp. Alg. ii. p. 29).—Conferva
Plumula, E llis ; Dillw. Conf. f. 50.
H ab. Georgetown, rare, Gunn, IF. H. H., Archer.
D istr ib. Europe.
In the Tasmanian specimens the ramuli a re more squaiTOse than usual, and in the older p a rts of th e frond
finally become, through excessive branching, densely fasciculate.
3. Callithamnion cruciatum ? (Ag.; J. Ag. Sp. Alg. ii. p. 28 ; Harv. Phyc. Brit. t. 164 ; Kiitz.
Sp. Alg. p. 649; Harv. Alg. Exsic. n. 545).
H ab. Georgetown, very rare, Gunn, IF. H. II.
D istiub. Europe.
The Tasmanian specimens differ from the European chiefly in the ramification of the opposite plumules, the
ramuli being very generally alternate, not opposite, and sometimes forked, aud the rachis being angularly bent, and
not straight. The apices are quite blunt. Possibly it would be better to consider the present form as a distinct
but representative species. It must however be allowed that its European representative varies greatly in the composition
of its plumules,— I formerly, by mistake, communicated to Professor Agardh a poor specimen of tlie follow-
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