52 NOTKS ON AUSTRALIAN MARINE ALG.E, ]., 



distributed around the shores of the south-east Australasian seas. 

 Personally I have only found it growing on the varieties of Hor- 

 mosira banksii. 



Haliseris Targioni-Tazzetti . 



Frond laminar, membranaceous,* dichotomous, midribbed, seg- 

 ments broadly linear, formed of two layers of cells, interior cells 

 rather angular, those constituting the midrib non-approximated, 

 cortical cells subcubical, monostromatic, densely packed with 

 endochrome. Spores scattered on both surfaces of the frond. 

 Tetraspores collected in naked sori, sublinear or in patches, 

 evolved on both surfaces of the frond. Paranemata separate 

 from the sporiferous sori, in small clumps, articulate, club-shaped. 

 Antheridia clustered in sori. 



None of the Australian species show marginal veins. 



i., Fronds membranaceous, with no veins from the midrib. 



//. polypodioides(Desfont.) Ag. A form of wide distribution, 

 Europe, Atlantic, S. Africa, Red Sea, Persian Gulf, Japan. — 

 " Tasmania(Harvey)" De Toni. 



H. wood '/card fia(R.Br.) J. Ag. = II. polypodioides var. denticulate 

 Sonder. — Has the habit of II. poli/podioides, but the margins of 

 the fronds are beset with numerous denticles. 



Cape York(Daemel), Rockingham Bay (Dallachi), Ballina(Hen- 

 derson). — Sarawak(Zanardini), China Sea(Kuetz). -Figured by 

 Kuetzing(Tab. Phvc. ix., t.53). 



H.muelleri Sonder, Linnsea( Vol.25; Fig., Harvey, Phyc.Austr., 

 P1.180). — Sori of tetraspores in oblong cloud-like patches, con- 

 tinent over the greater part of the frond from the midrib to the 

 margins. Axils rounded, margins entire. Fronds to 50mm. 

 wide. Proximal part of frond gradually denuded. Tufts of 

 paranemata scattered equally over the whole frond, alternately 

 on one face and on the other. 



West and south coasts of Australia (Sonder, Harvey), Anglesea, 

 Barwon Heads, Port Phillip (Lucas), Port Phillip Heads and 

 Western Port (J. Br. Wilson), Cape Schank(Mrs. Barker). — 

 Tasmania(W. H. Archer). 



•Coriaceous in the Brazilian H. areschougii J.Ag. 



