may possibly contain antheridia. Spores unknown. Colour, when growing, 

 purple. Substance gelatinous wlien fresh, soft and membranous when dry ; 

 in which state the frond closely adheres to paper. 



The subject of our present Plate was discovered while staying 

 at the hospitable house of George Cheyne, Esq., of Cape Riche 

 and Albany, Western Australia, in compliment to whom and to 

 Mrs Cheyne I have pleasure in naming it. The neighbourhood 

 of Cape Riche is a most famous botanizing ground, as far as the 

 exuberant and thoroughly Australian land Flora is concerned ; 

 but I did not find the coast equally rich in Algae, and the present 

 is one of the few new species which I added to my list whilst 

 sojourning at the farm. In the genus to which it belongs it is 

 distinguished by its unusually bright colour, and the length, 

 freedom, and slight ramification of the peripheric filaments. 



Fig. 1. Ltagoka Ciieyneana, — the wdnral size. 2. Some of the axile and the 

 peripheric filaments. 3. One of the peripheric tilaraents, bearing avihc- 

 ridia(?). 4. One of the tilaincnts, of which the globular tuft of antheridia (?) 

 consists : — variously ma(j)iijied. 



