Coccocarjoe^e.'] grateloupia. 235 



Geuus LXY. GEATELOUPIA, AgarclL 



Gen. Char. Frond flat, more or less pinnate, membranaceous, 

 flexible, solid, composed of densely interwoven, anastomosing, 

 branching filaments, those of the periphery moniliform, short, 

 and very strongly compacted together. Fructification : 1, globu- 

 lar masses of spores (favellidia) immersed beneath the peri- 

 pheric stratum, communicating with the surface by a pore ; 

 2, cruciate tetraspores, vertically placed among the filaments of 

 the periphery, in sub-defined sori. — In honour of Dr. Grateloup, 

 a French Algologist. — Harvey. 



1. Grateloupia eilicina, Agardh. 



Hab. On rocks and stones in the sea. Yery rare. Dis- 

 covered by Miss Cutler. Found by Mrs. Griffiths at Bar- 

 rowcane ; and by Mr. Ealfs^ Mount's Bay, Cornwall ; plen- 

 tiful. The finest specimens I have ever seen were gathered 

 by Mrs. Gulson at Exmouth. It lias not been found in 

 Scotland or Ireland. ^^The only British plant with which 

 this is likely to be confounded is Gelulium corneum, to some 

 varieties of which, especially G.Jlexudsunij it bears a very 

 strong resemblance. Its softer and more membranous sub- 

 stance will generally distinguish it to the feel; and the 

 microscope will point out a difference of structure.''^ — Ilarvei/. 



