Alge, by W. H. Harvey.] FLORA OF TASMANIA. 339 
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. Alg. i. p. 451; Kiitz. Sp. Alg. p. 500; Harv. Phyc. Brit. 
t. 93).—Fucus tomentosus, Turn. Hist. t. 135; E. Bot. t. 712. 
Has. Georgetown and seacoast generally, common. 
DrisrarB. Found throughout the northern, tropical, and southern oceans. 
Gen. CXVII. DICTYOSPHARIA, Dene. 
(Dene. in Nouv. An. Sc. Nat, xvii. p. 328.) 
l. Dictyosphzeria sericea (Harv.) ; fronde umbilicata medifixa varie lacera (nunquam vesicata) 
sericea, vesiculis minimis globoso-polyhedris.—Harv. in Trans. R.I. Acad. xxii. p. 565. (Tas. CXCVI. A.) 
I venture to introduce this plant as probably occurring on the outer coasts of Tasmania. It is found abun 
dantly 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.—PrATE CXCVI. 4. Fig. 1, plant, nat. size; 2, portion of frond, magnified. 
Trine II. BATRACHOSPERMEZ. ` 
Gen. CXVIII. BATRACHOSPERMUM, Roth. 
(Roth, Fl. Germ. iii. p. 480. Ag. Syst. p. 23. Endl. 3rd Suppl. p. 22. Kütz. Sp. Alg. p. 595.) 
l. Batrachospermum atrum (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; 
£. Bot. t. 690. 
Has. Pools in a rivulet, near Launceston, Gunn (n. 1826). 
Disrris. Native of fresh-water streams in Europe. 
2. Batrachospermum moniliforme (Roth, Ag. Syst. p. 53; Kütz. Sp. Alg. p. 535).—Conferva 
gelatinosa, Dillw. t. 32. 
Han. Mountain stream, near Cheshunt, W. H. H. 
DisrnrB. Native of Europe and America. 
3. Batrachospermum vagum (Ag. Syst. p. 52; Kiitz. Sp. Alg. p. 536). 
Haz. In the Cataract River, Launceston, W. H. D 
Disrris, Native of Europe and America. 
Tre III. CONFERVEA. 
Gen. CXIX. CLADOPHORA, Kütz. 
(Kütz. Phyc. Gen. p. 269. Kiitz. Sp. Alg. p. 387. Harv. Phyc. Brit., etc.) 
1. Cladophora Feredayi (Harv.); longiuscule stipitata, letevirens, siccitate vitreo-nitens, rigi- 
diuscula, filis longissimis setaceis angulatim flexuosis decomposite di-trichotomis et alterne ramosis, ramis 
nune discretis nunc intertextis flexuosis pluries divisis, ramulis ultimis dense  fasciculatis, articulis 
ramorum longissime cylindraceis diametro 20-30-plo longioribus, ramulorum ad genicula contractis 
diametro 5-6-plo longioribus.—Harv. Ag. Austr. Exsie. n. 584; Phye. Austr. t. 4T. 
Haz. Georgetown, in deep water, Rev. I. Fereday, Gunn, W. H, H, ete. 
