50 NOTES ON AUSTRALIAN MARINE ALGjE, i , 



during the " Sealark " Expedition to the Indian Ocean (Trans. 

 Linn. Soc. Lond., Vol. xii., Pt.4, 1909). This form has been 

 recorded from Macassar and from New Guinea, and may well be 

 found in the future on the islands of Torres St. and perhaps on 

 our tropical coasts. In T. murrayana there are no vesicles, the 

 leaves being solid. May not the simple unbranched form with 

 solid leaves be a reef-growing stage of T. decurrens ? One is so 

 familiar with non development of vesicles until they are func- 

 tionally needed in other Sargassacese, notably Sargassum and 

 Cystophora^ that one may expect to find evesiculose individuals 

 in the case of normally vesiculose species of Turbinaria. In 

 fact, there is a similar variety, evesiculosa Bart., of T. conoides. 

 Both vesicled and unvesicled forms of this species grew in the 

 Seychelles on reefs exposed at dead low tide, but in different 

 localities. 



Cystophyllum J.Ag. 



C. muricatum (Turn.) J.Ag., has a wide range, from the 

 Tropics to Tasmania. It is recorded from the Sunda Islands 

 and Austral ia(Freycinet, Preiss, Gaudichaud), and the Admiralty 

 Islands( Dickie). Harvey says it is found throughout the Indian 

 Ocean. It probably occurs all round the Australian coasts. 

 Thus Harvey gives the range " from King George's Sound to 

 Port Jackson, in various places." Victorian records are Port 

 Phillip(F. v. Mueller), Geelong(Lucas), Port Phillip Heads and 

 Western Port (J. B. Wilson). Sonder gives Georgetown, Tas- 

 mania. In New South Wales I have found it in Botany Bay 

 and Port Stephens. Mr. D. Stead sent me specimens from 

 W^allis Lake, where it is regarded as a nuisance on the oyster- 

 banks; and Sonder gives Clarence River. Queensland localities 

 are Moreton Bay(Lucas), Port Denison, Rockingham Bay, Cook- 

 town, and Whitsunday Island(Sonder). This is a remarkably 

 extended distribution for a brown alga whose habitat is sheltered 

 harbours. 



Figured, Turner (Hist. Fuc. ii., P1.112), Harvey (Phyc Austr., 

 PL 139). The fruiting receptacles are very similar to those of 

 Sargassum, and are produced in the summer about Sydney. 



