306 ALGiE INARTICULATE. [Chcetospom. 



Abundant upon the rocky coasts, every where, together with many 

 of the varieties.— ?. Exmouth, Sir T. Frankland.—v. Peakhead, near 

 Sidmouth, Dr. Gremlle.—p. and v. Bantry Bay, Miss Hutchins.—l. Corn- 

 wall, Mrs. Griffiths.—*. Cornwall and Devon, Mrs. Griffiths.— z- 

 Mount's Bay, Cornwall, Mrs. Griffiths.— <r. Devon and Cornwall, Mr. 

 Stackhouse. Sussex, Mr. Borrer. Firth of Forth, Dr. Bichardson 

 Appin, abundant, Capl. Carmichael.—r. Norfolk, Mr. Turner. Sid- 

 mouth, Mrs. Griffiths. Near Ilfracombe, Mr. Hare. Cornwall, Mr. 

 Bashleigh. Brighton, Mr. Borrer. Belfast, Mr. Templeton. V- • Sum- 

 mer. — This is perhaps the most variable of all our submersed Algae, and 

 few who have been accustomed to observe the plant on its native rocks 

 at different seasons and in different localities, will hesitate in agreeing 

 with Agardh, that the Fucus pusillus of Stackli., and F. crinalis of 

 Turner,°should be united with it. I have here adopted the British varie- 

 ties of this plant, enumerated by Mr. Turner, and have added others 

 from Dr. Greville. 



39. Grateloupia. Ag. Grateloupia. 



Frond cartilagineo-membranaceous, plane, somewhat pin- 

 nated with branchlets or fringed with foliaceous processes. 

 Fructification ; minute aggregated tubercles furnished with a 

 pore, and containing a mass of free elliptical or roundish seeds. 



Grev. Alg. Brit. p. 151./. 16 Named in compliment to Dr. 



Grateloup, a French Algologist. 



1. G.filicina, Ag. {Fern-like Grateloupia) ; frond linear at- 

 tenuated simple or divided irregularly pinnated with ramuli at- 

 tenuated at each extremity. Grev. Sp. Alg. Brit. p. 151. t. 16. 



Delesseria filicina, Lamour. — Fucus filicinus, Wulf. — Turn. 



Hist. Fuc. t. 150. 



On rocks and marine substances, Sidmouth and Ilfracombe, Miss 

 Cutler. If..? Fructification. Autumn.— I have not had the good fortune 

 to obtain British specimens of this rare plant, and I have only seen a 

 solitary barren one in the possession of Mr. Harvey. Those in my 

 Herbarium from the Mediterranean, gathered by Mr. Swainson, are of 

 an olive-green colour, copiously once or twice pinnated and of a very 

 lubricous^ texture so as to adhere firmly to paper when dry, well 

 agreeing indeed with the figure and description of Mr. Turner, rather 

 than with the Devonshire specimens, which are smaller, of a purplish 

 red, and adhere but slightly to paper. 



40. Chetospora. Ag. Chaetospora. 



Frond subgelatinous, filiform, branched, rose-coloured, ulti- 

 mate ramuli setaceous, swelling into lanceolate receptacles, com- 

 posed of naked branched filaments radiating from an axis, in the 

 centre of which is situated the obscure// uctification (minute 

 seeds or capsules). Grev. Alg. Brit. p. 153. t. 16 — Name ; %a,r?j, 

 a bristle, and o-mgot, a sporide or seed; in allusion to the fructifi- 

 cation- as connected with filaments. 



1. C. Wigghii, Ag. (Mr. Wiggs Chaetospora) — Ag. Sp. 

 Alg. p. 146. Grev. Alg. Brit. p. 153. t. \§.— Fucus Wigghii, 



