THE MARINE BOTANIST. 293 



V. velutina. On muddy sea-shores. Annual. 

 Spring and summer. Appin, Argyleshire. Mil- 

 town Malbay, west of Ireland. ^^ Filaments inter- 

 woven into a dense, velvety, green stratum, pel- 

 lucid below, and creeping over the mud ; branches 

 near the extremity erect." 



CONFERVACE^.— CONFERVA TRIBE. 



GreeUy marine or fresh water algae, composed of 

 articulated threads or filaments, simple or branched, 

 free or surrounded by gelatine. Cells cylindrical, 

 truncated. — Harv, 



The greater number of the plants of this tribe 

 are found in fresh water : three genera alone con- 

 tain strictly marine species. In the first, Clado- 

 phora, a few examples only, inhabit streams ^ while 

 the majority of the Conferva grow indifierently in 

 running or stagnant water. Cladophora contains 

 upwards of a score of species indigenous to the 

 shores of Britain : they require to be examined in a 



