110 SEA MOSSES. 



Genus.— ELACHISTA* Duby. 



Elachista fucicola, Fr. 



No doubt you will wonder what the little tufts 

 of olive colored hairs are, which are so common upon 

 the " Rockweed," every hair of which seems to radiate 

 unbranched, from some central point of attachment 

 hidden in the tuft. I have given its name above. 

 It will be noticed also that, though the longest hairs 

 are not over half an inch long, there is a mass of 

 them much shorter than that, above the general crop 

 of which, the long ones seem to stand out stiff and 

 solitary. It had better, perhaps, be removed from 

 the Fucus before mounting, though a thin slice of 

 that might be cut off with the Elachista. It makes 

 a very interesting microscopical object. Its delicate 

 pencils may be found upon the " Rockweed " almost 

 everywhere, for it is widely distributed. 



Su b-order.— SPHA CELARIEsE. 

 Genus.— CLADOSTEPHUS j Ag. 



Cladostephus verticillatus, Ag. 



The whorled Cladostephics is very easily dis- 

 tinguished from all other plants of the sea, except 



* Elachista — The smallest, 

 t Cladostephus zr- Branch crowned. 



