60 COMMON SEAWEEDS. 



its colour, so must be mounted quickly. The joints in 

 this plant are pear-shaped, and the fruit is clustered 

 round them, protected by very short branches. The 

 tetraspores are densely crowded quite round the joint, 

 the favellcB are on one side only, and occupy the place 

 of a suppressed branch. The tufts are usually six or 

 eight inches Irish. Common on all our coasts. 



G-rieeithsia Eqttisetieolia. — So called, because 

 the stem is thickly set with whorls of ramuli or lesser 

 branches, and resemble the Equisetum or mare's-tail 

 of our meadows. It is a common plant on the south 

 coast of England and in the Channel Islands, but 

 rare in the north. It is a fine specimen for the 

 album, from three to eight inches long. Colour, red 

 or reddish-brown, staining the paper. Fructification 

 like the Griffitlisia Setacece — with now and then the 

 same curious bodies, supposed to be antliericlia, secreted 

 in tufts of ramuli. 



G-eieeithsia Simplicieilum. — Very like the Grif- 

 Htlisia JEquisetifolia, only more delicate, the branches 

 less forked, the joints longer, and the cells much more 

 transparent, having a wide pellucid border, and narrow 

 line of rich rosy red in the centre. It is rare. Found 

 in deep pools and near low- water mark, Channel Islands, 

 Ireland. 



G-eieeithsia Eabbata. — If we find this pretty 

 minute species, it is a prize, for it grows only on the 

 coasts of the Eritish Channel and in the Channel 

 Islands. Exceedingly lovely are the delicate fibres, 



