THE 



EDINBURGH JOURNAL 



NATIJTIAL AND GEOGRAPHICAL SCIENCE. 



JUNE, 1831. 



ORIGINAL ARTICLES. 



Art. I. — Description of Two Neio Species of Marine Algce. 

 By Robert Kaye Greville, LL.D. F.R,S.E. F.L.S. &c. 

 { With a Plate.) 



Scaberia. Grev, Alg, Brit, p. xxxvi. 



S, Agardkii, Grev. Alg. Brit. 1. c. Polyphacum 9 verrucosum 



Grev. et Ag. MSS. 



Hab. On the coast of Swan River settlement, New Hol- 

 land. — Fraser, 



Root absent in my specimens. Stem one or two feet long, 

 simple, or once or twice dichotomous, about the thickness of a 

 blackbird's quill, rigid, wiry, naked and rugose in its lower 

 part, (where it is also set with the remains of scattered, remote, 

 nearly horizontal, branches,) terminating at the extremity in a 

 fasciculus of branches, several inches in length, each bearing a 

 second, very rarely a third, series of smaller ones. These 

 branches are densely imbricated on all sides with minute carnoso- 

 coriaceous squamiform ovate leaves, about a line and a half long, 

 sessile, but peltate in their insertion, smooth beneath, clothed 

 above with minute shortly pedicellate warts. Vesicles numerousf, 

 spherical, intermixed with the leaves, and scattered along the 

 whole length of the branches, about the size of the seeds of 

 Lathy rus odoratus, thickly clothed with warts. Frtictification, 

 unknown. Colour livaceous, changing to black when the plant 

 is dried. , 



VOL. III. 2 u 



