172 SEA MOSSES. 



ever it is seen. Its color is a deep lake-red, when 

 fresh or young, but often flecked with green, or 

 white, or yellow, or faded to pink, when it has been 

 long exposed on the shore. There are very many 

 beautiful plants to be found among its various forms. 

 It does not readily, or very firmly adhere to paper 

 in drying. 



I find, from an old work on my shelves, by 

 Gmelin, of St Petersburg, that it was described 

 more than a century ago, he having then already, 

 received specimens of it from Kamtschatka. It is 

 essentially an arctic plant. I have two copies from 

 Spitzbergen, where it is described, as being among the 

 most common of the red Algae. 



Delesseria alata, Lam. 



The winged Delesseria has the same general 

 habit as D. siniwsa, except that it is a very much 

 narrower, and more delicate plant. It grows in much 

 the same situation, and may be looked for in the 

 same places. It will almost always be found on our 

 shores in connection with Ptilota plumosa, var. ser- 

 rata, on whose frond it is very commonly parasitical. 

 It is commonly not more than three inches high, 

 though I have both English and American specimens, 

 twice that. 



