52 



HANDY BOOK OF 



LXI1I. Gelidium. From gelee, frost, whence also gelatine; 

 but none of the species are gelatinous. 



1. Corneum, horny gelidium. 



2. Cartilagineum, cartilaginous. 



LXIV. Grateloupia. In honour of Dr. Grateloup, a French 

 algologist. 



1. Felicina, fern-like Grateloup. 



Family XIII.— Sph^eococcoide^:. 



Rhodymenia Palmata. — Contributed by Dr. Cocks. 



LXV. Hypnea. An alteration of Hypnum, the name of a 

 genus of mosses, in allusion to the mossy character of 

 some of the original species. 



1. Hypnea purpurescens, purple hypnea. 



