330 FLORA OF TASMANIA. [4lge, by W. H. Harvey, 
| Bass’s Straits, and along the whole coasts of Australia, it probably oecurs on the rocky shores of Tasmania. Native 
of tropical and subtropical seas. 
Gen, CVI. CERAMIUM, Roth. 
(J. Ag. Sp. Alp. ii. p. 113. Harv. Phyc. Brit. t. 181, etc.) 
l. Ceramium rubrum (Ag.; J. Ag. Sp. Alg. ii. p. 127; Kütz. Sp. Alg. p. 685; Harv. Phye. 
Brit. t. 181).—Conferva rubra, E Bot. t. 1166. 
Has. On the larger and smaller A/ge, common. 
Disrris. Cosmopolitan. 
2. Ceramium diaphanum (Roth; J. Ag. Sp. Alg. ii. p. 125; Harv. Phye. Brit. t. 193).—Conf. 
diaphana, Dilho. Conf. t. 38; E. Bot. t. 1142. 
Haz. Georgetown, Gunn. 
Disrris. Cosmopolitan. 
9. Ceramium ramulosum (Hook. fil. et Harv. Lond. Journ, vi. p. 410; J. Ag. Sp. Alg. ii. 
p. 121). 
Has. Georgetown, Guna. 
The Tasmanian specimens formerly referred to C. nodosum and C. Deslongchampsii, seem rather to belong to 
the present species, which is nearly related to the former. 
4. Ceramium gracillimum (Kütz.; Harv. Phyc. Brit. t. 206; J. Ag. Sp. Alg. ii. p. 118). 
Has. Georgetown, on Zostera, etc., W. H. H. 
Disrris. Europe. North America. 
5. Ceramium puberulum (Sond.).—Cer. monile, Hook. Jil. et Harv. Lond. Journ. vi. p. 410; d. 
Ag. Sp. Alg. ii. p. 132.  Celeceras monile, Küfz. Sp. Alg. p. 684. 
Has. Georgetown, common. 
Disrris. Western Australia. 
Gen. CVII. HALOPLEGMA, Mont. 
(Mont. An. Sc. Nat. 1842. Endl, 3rd Suppl. p.36. J. Ag. Sp. Alg. ii. p. 110.) 
l. Haloplegma Preissii (Sond. Alg. Preiss. p. 24; Kütz. Sp. Alg. 672; J. Ag. Sp. Alg. ii. 
p. 111).—Rhodoplexia Preissii, Harv. in Hook. Ic. Pl. t. 618. 
Var. B. flabelliforme; fronde tenuiori latiori parum lobata flabelliformi. 
Has. Mouth of the Tamar, not uncommon. Flinders’ Island, Dr. Milligan. Var. 8. In the Tamar, 
above Georgetown, on rocky shores at low-water. 
Disrris. West and south coasts of Australia. 
Our var. 8, which is common on shores, under Mr. Lawrence's place, a short distance above Georgetown, 
differs from the usual state of the species in being much thinner and more translucent, the lobes fewer and much 
broader, and in the colour, which is more purple. The microscopic characters of the two plants are, however, 
identical, and various intermediate states occur towards the mouth of the River Tamar. 
Gen. CVIIT. CROUAN IA, J. Ag. 
(J. Ag. Alg. Medit. p. 83. Endl. 3rd Suppl. p. 36. Harv. Phyc. Brit. t. 106. J. Ag. Sp. Alg. ii. p. 104.) 
l. Crouania attenuata, var. australis (Harv. Alg. Austr. Exsic. n. 485; J. Ag. Sp. Alg. ii. 
p. 105; Harv. Phyc. Brit. t. 106). 
Has, At Table Cape, Miss Mackenzie. 
