AUSTRALIAN AND TASMANIAN ALG, Xx 
Subgenus 2. PotysreHon1a.—Siphones primarii sex v. sepissime plures. 
Sect. 4. ByssoipEm.—Jyrons pellucide articulata, alterne ramosa, polysiphonia. 
Ramuli monosiphonii, dichotomi. 
238, Cladostephus; Mont. (PLATE CLIV.) 
Has. West and south coasts, common. ‘Tasmania. (New Zealand. 
Lord Auckland’s Island.) 
Sect. 5. Pennate®.—Siphones 12-16. Frons pellucide articulata, rosea v. purpu- 
rea, cartilaginea v. flaccida, sepius disticha,pinnatim composita,  Ramuli simpli- 
cisstmi, subulati, laterales, alterni v. secundi, raro quaquaversi, polysiphonit.. 
239, dendritica, 47. (Harv. Ner. Austr. p. 47.) 
Has. Port Philip, Dr. Mueller. (New Zealand. South America.) 
240. pennata, 47. (Ag. Sp. Alg. ii. p. 928.) 
Has. King George’sSound. Port Jackson, C. Moore. (Mediterranean Sea.) 
241. versicolor, Hook. f. and Harv. (Ner. Austr. p. 48. t. 16.) 
Has. West and south coasts of Australia. Tasmania. (Very variable 
in size ; sometimes capillary, sometimes ultra-setaceous.) 
242, monilifera, Hook. f. and Harv. (Ner. Austr. p. 48. t. 16.) 
Has. Tasmania, R. Gunn. 
243, rostrata, Sond. (PLatre CCXLII.) 
Has. Western Australia, common. 
244, filipendula, /Tarv. (Ag. Sp. ii. p. 920.) 
Has. Western Australia, W. H. H., G. Clifton. Port Fairy, VW. H. H. 
245. pectinella, Harv. (Ag. Sp. Alg. il. 918.) 
Has. On mud, near high-water mark, King George’s Sound. 
246, ericoides, /Tarv. (PLuaTE CLXXXV. A.) 
Has. Port Arthur, Tasmania. 
247, Calothrix, Harv. (Piate CLXXXV. C.) 
Has. Tidal rocks, at King George’s Sound. 
248. prorepens, Harv. (PLate CLXXXV. B.) 
Has. King George’s Sound, parasitical on Dicranema Grevillei. (Algoa 
Bay, South Africa.) 
249, Pecten, 4resch. (Ag. Sp. Alg. ii. 918.) 
Has. Port Adelaide, Herb. Areschoug. 
Sect. 6. CANCELLATH.—Siphones sepissime 7, raro 8-9. rons fusca, siccitate 
nigrescens, sulcata, fruticosa, vage ramosissima, rarius dichotoma. Ramuli de- 
compositi. 
250, nigrita, Sond. (Ag. Sp. Alg. ii. 1048.) 
Has. Western Australia. 
251, caucellata, Harv. (Ner. Austr. p. 51. t. 15.) 
Has. West and south coasts, common. ‘Tasmania. 
252, frutex, Harv. (Ag. Sp. Alg. ii. 1047.) 
Has. South coasts of Australia. Tasmania. 
253. fuscescens, //ary. (Ag. Sp. ii. 1050.) 
Has. Port Philip. Tasmania. 
254, Patersonis, Sond. (P. spinosissima, Harv., PLatE CLV.) 
Has. Cape Paterson, Dr. Mueller, 1853. Port Fairy. Tasmania. 
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