LOW-WATEK MAEE. 83 



laden probably with tetraspores, or on shorter main 

 branches a group of favellce. 



This charming plant is scattered in its loveliness 

 everywhere. Dr. Hooker gathered it off stormy Cape 

 Horn. Mr. Gunn sent it home from the sunny bays 

 of Tan Diemen's Land. So gracefully yielding to the 

 rough waves' play, that even those delicate tetraspores 

 are not shaken from their sprays until the time when 

 they must die to live. 



Calltthamnion CuTJCiATUir (Cross-bearing Calli- 

 thamnion). — On mud-covered rocks at lowest tide; 

 rather rare. This may be known from Callithamniori 

 Plumula by the tips of the branches being evidently 

 tufted, opposite branchlets at every joint of the larger 

 ramuli, and crimson tetraspores, marked distinctly 

 with a ivhite cross. 



The filaments are from one to two inches long, hair- 

 like, flaccid ; colour, brownish-red. It adheres closely 

 to paper, but is apt to decompose if wetted after once 

 it has dried. 



Caltjtiiahniois' Brodiozi. — Parasitic on other sea- 

 weed in deep pools. At first sight may be mistaken 

 for a small specimen of Callitliamnion Tetragonum ; 

 but examined with a lens the lateral tufts are quite 

 differently arranged. The tetraspores are numerous, 

 the favellce large, and by crushing one we see how 

 full these berries are of angular spores. 



This is rather a rare plant, but found at Torquay, 

 Cornwall, and Guernsev. 



