.5. Caulerpa Harveyri (Muell.) j surculo et parte inferiori caulis nudo nitente, caule vage ramoso,
ramis paucis elongatis simplicibus densissime foliosis, ramentis (foliis) sæpius quinquefariis raro quadrifariis
longissimis filiformibus patentibus apice obtuse mucronulatis.—Haro. Phyc. Austr. t. 95.
Var. 0 . crispata ; minor, ramentis crispatis squaiTOsis v. inflexis.
H a b . Fragments sent by ilf?-. Gunn.
D i s t r ib . Native of the south coast o f New Holland.
Surculus brauching, 1 or 2 lines in diameter, with a smooth and shining yellow epidermis. Stem 1-2 feet
high, bare of leaves for some two to fom iuches above the base ; from thence to the apex closely set with five or
rarely four vertical or slightly spiral ranks of patent, filiform leaves or ramenta. Sometimes the stem is quite simple,
but commonly it bears a few lateral, leafy branches, in all respects similar to the leafy portion of the stem.
Branches long and virgate, patent, irregularly inserted. Leaves (or ramenta) nearly an inch long, as thick as hog’s-
bristle, subacute and somewhat mucronate, of a deep-green colom, becoming olivaceous when dry ; the apices, where
the younger leaves are densely crowded together, frequently orange.—Dried specimens give no clear idea of the living
plant, as it is impossible to preserve in drying the regular ranks in which the leaves are set, and in which they stand
paraUel to each other. Our var. 0 is a dwarf form, growing in tide-pools. It is always of a pale-green colour,
and its ramenta more or less curled, or rolled in upon the axis.
6 . Caulerpa sed o ide s (Ag. Sp. Alg. i. p. 4 3 8 ; Endl. 3rd Suppl. p. 1 6 ; Kütz. Sp. Alg. p. 498).
—Caulerpa geminata, Harv. Fucus sedoides. Turn. Hist. t. 172.
H a b . On crevices of tidal rocks : Five-mile Bluff, etc., Gunn.
D i s t e ib . Native of tropical and subtropical seas.
Sometimes the ramenta are perfectly distichous, in wdiich state I formerly mistook it for a new species, which I
called C. geminata. I hare since traced the two forms into one. Some others of the genus vary iu a similar way,
distichous and tetrastichous ramenta being sometimes found on the same root.
7. Caulerpa simp lic iu scu la (Ag. Sp. Alg. i. p. 4 3 9 ; Kütz. Sp. Alg. p. 499).—Fucus simplicius-
culus. Brown; Turn. Hist. 1 .175.
H a b . Georgetown, etc., Gunn, JF. H. H.
D is t r ib . West and south coasts of New Hollaud.
8 . Caulerpa sca lp ellifo rmis (Ag. Sp. Alg. i. p. 437 ; Kütz. Sp. Alg. p. 496).—Fucus scalpelli-
formis, R. Br. Turn. Hist. t. 174.
H a b . Dredged in the Tamar, Mr. Charles Henty.
D is t r ib . West and south-west coasts of New Holland.
I saw specimens of this species, which is found all along the south coast of New HoUand, with Mr. Hcnty,
who had dredged them below Georgetown. It has not been sent by Mi'. Gunn, and appears to be rare.
9. Caulerpa cac toide s (Ag. Sp. Alg. i. p. 4 3 9 ; Harv. Phyc. Austr. t. 26).—C. corynephora,
Mont. Foy. Pol. Sud, p. 18. t . 8 . f . 3 ; Sylloge Sp. Crypt, p . 452. n. 1600. Fucus cactoides, R. Br. in
Turn. Hist. t. 171.
H a b . Southport, C. Sluart.
D is t u ib . Western and southern coast of New Holland ; Isle of Toud.
Mr. Stuart’s specimen is smaller than the usuid Australian form, such as we are acquainted with, from Western
Australia and from Victoria, but it is fully as large as the specimen figured by Montagne. Turner’s Fucus cactoides
is intended for the larger variety of this species, but it incorrectly represents the club-shaped ramuli as being
quadrifarious. They are always strictly distichous iu our numerous specimens from several localities.
Gen. CXVI. CODIUM, Stack.
(Stack. Ner. Brit. p. 24. Ag, Sp. Alg. i. p. 451. Kiitz. Sp. Alg. p. 500.)
1. Codium tomentosum (Ag. Sp. AJg. i. p. 4 5 1 ; Kütz. Sp. Alg. p. 5 0 0 ; Harv. Phyc. Brit.
'3).—Fucus tomentosas. Turn. H is t t 135 ; E. B o t t 712.
H a b . Georgetown and seacoast generally, common.
D i s t r ib . Found throughout the northern, tropical, and southern oceans.
Gen. CXVII. DICTYOSPHÆEIA, Dene.
(Dene, iu Nouv. An. Sc. Nat. xvii. p. 328.)
1. Dictyosphaeria s e r ic ea (Harv.) ; fronde umbilicata medifixa varie lacera (nunquam vesicata)
sericea, vesiculis minimis globoso-polyhedris.— ¿Tarv. in Trans. R. I. Acad. xxii. p . 565. (T a b . CXCVI. A.)
1 venture to introduce this plant as probably occurring on the outer coasts of Tasmania. It is found abundantly
on rocks near low-water mark, in crevices, on the west and south coasts of New Holland, at least as far as
Western Port, Victoria.—P la t e CXCVI, A. Fig. 1, plant, nat. size; 2, portion of fi-ond, maynified.
T r ib e I I . BATRACHOSPERMEÆ.
Gen. CXVIII. BATEACHOSPEEMUM, Roth.
(Both, Fl. Germ. iii. p. 480. Ag. Syst. p. 23. Endl. 3rd Suppl. p. 22. Kütz. Sp. Alg. p. 535.)
1. Batrachospermum atm m (Harv. Man. ed. 1. p. 120; Hass. Br. Fresh-water Alg. p. 114.
t. 16. f. 12).—B. moniliforme, var. detersum, Ag. ; Kütz. Sp.-Alg. p . 535. Conferva atra, Dillw. t. 11 ;
E. B o t t 690.
H a b . Pools in a rivulet, near Launceston, Gunn [n. 1826).
D i s t e ib . Native of fresh-water streams in Europe.
2. Batrachospermum moniliforme (Eoth, Ag. Syst. p. 5 3 ; Kütz. Sp. Alg. p. 535).—Conferva
gelatinosa, Dillw. t. 32.
H a b . Mountain stream, near Cheshunt, JF. H. H.
D i s t r ib . Native of Europe and America.
S. Batrachospermum vagum (Ag. Syst. p. 5 2 ; Kütz. Sp. Alg. p. 536).
H a b . Iu tlie Cataract Eiver, Launceston, JF. H. H.
D is t r ib . Native of Europe and America.
T r ib e I I I . CONFERFEÆ.
Gen. CXIX. CLADOPHOEA, Kiitz.
(Kütz. Phyc. Gen. p. 269. Kütz. Sp. Alg. p. 387. Harv. Phyc, Brit., etc.)
1. Cladophora Per ed ayi (Harv.) ; longiuscule stipitata, lætevirens, siccitate vitreo-nitens, rigidiuscula,
filis longissimis setaceis angulatim flexuosis decomposite di-trichotomis et alterne ramosis, ramis
uunc discretis nunc intertextis flexuosis pluries divisis, ramulis ultimis dense fasciculatis, articulis
ramorum longissime cylindraceis diametro 20-30-pIo longioribus, ramulorum ad genicula contractis
diametro 5-6-pIo longioribus.—Harv. Alg. Austr. Exsic. n. 584 ; Phyc. Austr. t. 47.
H a b . Georgetoryn, in deep water, Rev. I. Fereday, Gunn, IF. H. II., etc.