31i BraiiSH SEA-WEEDS. [C/doros2:)erm€(e, 



discovered by Mr. M^Calla in Eoundstoue Bay in such 

 abundance that it was carted away for manure. At the 

 depth of four or five fathoms it covers the bottom to a con- 

 siderable extent. 



It is about a foot long, and cannot be mistaken for any 

 other species, being so easily known by its patent, opposite 

 branches and brancldets. It is of a light green coloui". It 

 does not adhere well to paper in drying. See in ' Phyco- 

 logia Britannica,^ PI. xii., a good figure of var. ^, with 

 longer branches. 



3. Cladophora pellucid a, Kiitz. 



Hab. On the bottom and sides of deep rock-pools near 

 low-water mark. Annual ? Summer. Not uncommon on 

 the shores of England and Ireland. We do not know that 

 it has been found in Scotland. I have a specimen of it 

 from !Mr. William Thompson. 



It is a well-marked species, as may be seen from Phyc. 

 Brit., PI. CLXxiv. 



4. Cladophora lanosa, Kiitz. (Plate XYII. fig. 65, 

 two fine tufts, natural size ; and on the right hand a portion 

 of a filament, magnified.) 



Hab. In the sea on rocks and on other xVlga3. Annual. 

 Summer. Common. 



