566 Dr. W. H. Harvey's Account of the Marine Botany, S^-c. 



these specimens should be referred, but I fear that author has needlessly multiplied the 

 names in this genus. 

 346. Enteromorpha compressa. Submerged rocks and woodwork, everywhere. 



Order IV OSCILLATORIACE.^. 



347. RivnLARiA aiistralis, n. sp. ; fronde maxima (fronde 1-1 j uncias diametro) solitaria hemispha;- 



rica solida lubrica olivaceo-Tiridi. On rocks near low-water mark, Cape Riche (298). I 

 suppose this belongs to Kiitzing's genus Euactis, but I have not minutely examined it. It 

 is the largest of the genus known to me. 



348. RivuLAKiA sp. Near R. plicaia, Carm. Upper end of Princess Royal Harbour, on stones 



and wood in shallow water (19). 



349. CktOTURWcccspitula, Harv.? Parasitical on ^/(/6e, in tide-pools at Cape Riche (299). This 



requires to be compared with the European plant, to which, if not the same, it is closely 

 related. 



350. Calotiirix limbata, MS. Littoral rocks, Rottnest (277). 



351. Calothrix sp. Cape Riche (334). 



352. Calothrix sp. Cape Riche (335). I cinnot at present identify these species ; and have be- 



sides two others, collected in smaller quantity. 



At Sea, .September 4, 1854. 



