Algm.-\ CALIFORNIA—SUPPLEMENT. 407 



2. F. furcates, Ag. Syst. p. 279. Harv. supra, p. 163. 

 San Francisco. Dr Sinclair. 



1. Cystoseira Douglasii (Harv.); caule tenui laevi alternatim ramoso, ramis decom- 

 positis pinnato-dichotomis, axillis rotundatis, vesiculis ellipticis concatenatis in ramulis 

 immersis. 



Stem slender, \ a line to a line in diameter, compressed, smooth, 12 inches long or more, furnished with 

 alternate, much divided branches, at distances of an inch or upwards ; the branches pinnated, the lower pinna; 

 simple or forked, the upper multifid in a sub-dichotomous manner ; all the axils rounded and the rauiuli erect, 

 apices attenuated. Vesicles as large as vetch-seed, 4-12 or more together, forming a moniliform chain, im- 

 bedded in the most of the ramuli. Receptacles and root unknown. Hab. Monterrey. Douglas. 



1. Halydrys osmundacea (Harv.) — Fucus osmundaceus, Turn. Hist. t. 105 Cystoseira 



osmundacea, Ag. Syst. p. 287. 

 Monterrey. Douglas. 



Tbibb 2. LAMINARIEjE. 



1. Laminaria saccharina, Lamour. — Fucus saccharinus. Linn. — Turn. Hist. t. 163. 



San Francisco. Dr Sinclair. — The lamina of the frond is remarkably narrow. 



1. Macrocystis pyrifera, Ag. Syst. p. 292. — Fucus pyriferus. Linn. — Turn. Hist. t. 110. 

 San Francisco. Dr Sinclair. 



2. M. Menziesii, Ag. Syst. p. 293. — Fucus Menziesii. Turn. Hist. t. 27. Harv, supra, 

 p. 163. 



San Francisco. Dr Sinclair. 



1. Alalia esculenta, Grev. — Fucus esculentus. Turn. Hist. t. 117. 



San Francisco. Dr Sinclair. — The specimen very imperfect. 



Tbibe 3. FLORIDEjE. 



1. Delesseria platycarpa, Ag. Syst. p. 252. — Fucus platycarpus. Turn. Hist. t. 144. — 

 Harv. supra, p. 163. 



Monterrey. Douglas. 



1. Hymenema Jissa, Grev. — Fucus venosus. Turn. Hist. t. 138. — (3. marginata, Harv. 

 capsulis marginalibus. 



A very remarkable variety, perhaps a distinct species. The veins are stronger and more prominent than 

 in Cape specimens, and the capsules confined to the margin or borne on small, roundish, marginal processes 

 or leaflets. The granuliferous specimens present no remarkable characters. Hab. San Francisco. Dr 

 Sinclair. 



