SphcBrococcoide(2.'\ gracilaria. 239 



tubercles on the branches, and the . lanceolate terminal 

 pods containing tetraspores, are sufficient to distinguish it. 

 When not in fruit, it is like G. confervoides in a young 

 state. As the Scotch specimens were not in fruit, some 

 doubt hangs over them. In Plate xiv. of Alg. Brit, there 

 are excellent figures of it, both of the natural size and mag- 

 nified, with dissections of the fruit, &c. ; and the same may 

 be said of Plate clxxvii. of ' Phycologia Britannica.'' 



2. Geacilaeia confervoides, Greville. (Plate XI. 

 fig. 44, branch of the natural size ; conjoined with it there 

 is a small portion of a branch with tubercles, magnified.) 



Hab. In the sea on rocks. Perennial. In fruit from 

 August to October. It is said to be of rather frequent 

 occurrence on the British shores, and yet I do not know 

 that it has been gathered in Scotland, except by the Eev. 

 J. Macvicar, many years ago in the Frith of Ta}', and by 

 Brodie of Brodie, at Jossiemouth, in 1806, and by us in 

 August 1850, dredged near Milport m the island of Cum- 

 brae. It is more than a foot and a half iw. length, and 

 easily known by its tubercles. Colour deep red. It is 

 cartilaginous, and does not adhere to paper in drying. 



3. Gracilajiia co^ipressa, Greville. 



Hab. Cast ashore from deep water, attached to coral, &c. 



