Dr. W. H. Harvey on new genera and species of Alga. 335 



4. Hanovia, Sond. 



Hanovia australis, Sond. — The cystocarps of this plant have 

 been sent to me by my friend Geo. Clifton^ Esq., of Fremantle, 

 West Australia. They are ceramidia, closely resembling those of 

 a Dasya, Hence this genus must be removed from Ceramiacece 

 to RhodomelacecB, where it will be placed next to Halydidyon. 



5. Ballia, Harv. 



1. Ballia Robertiana, n. sp. ; ramis minoribus, rachidibusque 

 plumularum cylindraceis (nee ad genicula constrictis) distiche 

 plumulatis ; plumulis incurvis oblongis bipinnatis oppositis 

 inter se alterne insequalibus, una pusilla pinnata v. vage mul- 

 tifida ramulis inflexis, altera elongata bipinnata basi ramulis 

 incurvis vage divisis fructiferis stipata, pinnis ambitu ovatis, 

 pinnulis oppositis incurvis creberrimis obtusis. (PI. VIII. C. 

 fig. 2.) 



Hab. Port Fairy. 



2. Ballia Mariana, n. sp. ; ramis minoribus rachidibusque plu- 

 mularum cylindraceis (nee ad genicula constrictis) tristiche 

 plumulatis v. verticillatis, plumulis incurvis e quoque geniculo 

 ternis vel pluribus inter se insequalibus, duobus pusillis inferne 

 multifidis super ne pinnatis rachide longe excurrente, uno ma- 

 jori verticillatim plumellato, plumellis patentibus pinnatis 

 bipinnatisve rachide excurrente, ramulis ultimis oppositis vel 

 s^pe alternis. (PI. VIII. C. fig. 1.) 



Hab, Port Fairy. 



6. Apjohnia, Harv. 



Frons stipitata, dendroides. Stipes radicatus, monosiphonius, 

 clavatus, annulatim constrictus et transversim rugulosus, epi- 

 dermide tenui calcarea donatus, in setate majori apice ramis coro- 

 natus. Rami confervoidei, umbellatim polychotomi, flabellatim 

 expansi, fastigiati, liberi, articulati; articulis clavatis monosi- 

 phoniis, omnibus basi ruguloso-annulatis, succo aquoso viridis- 

 simo repletis. 



Apjohnia latevirens, Harv. 



Hab, In deep tide pools, near low water mark, Phillip Island, 

 Western Port. 



Fronds rising from a mat of very tough and rigid branching 

 fibres, densely tufted, 3 to 6 inches high, stipitate, tree-like. 

 Stipes from an inch to an inch and a half long, clavate, nearly 

 2 lines in diameter at the thickened upper extremity, at first 

 obtuse and quite simple, consisting of a large, single cell filled 

 with watery endochrome. In advancing age this primordial cell 

 throws out from its apex four or more similar but smaller cells, 



