the Marine AUjcc of the Firth of Forth. 



441 



During the dredging operations conducted at various 

 parts of the estuary of the Forth, at different seasons of 

 the year, many entire or fragmentary species have been 

 observed. Those referred to below have been found some- 

 times on stones of various sizes brought up from the bottom, 

 many have been recorded on the carapaces of Crustacea, 

 and not a few have been dislodged from their attachment 

 to rocks by the passage of the dredge across them. At 

 various times forms have also been brought to light by the 

 small beam trawl, in all cases, the largest collections were 

 made when work was prosecuted on rocky and difficult 

 ground. On a muddy bottom living species were not 

 noted, except in cases where they were found attached to 

 the tests and shells of the lower animals, or to stones and 

 boulders recently submerged. 



The table on p. 4i2 contains a record of species found in 

 the vicinity of or beyond the May Island, and from this it 

 is manifest that the most common forms found in deep 

 water, in this neighbourhood, are Khodophyceae. From 

 the fact, moreover, that the only specimens of Nitophyllum 

 laceratum and N. imnctatura observed came up as free 

 fragments, and also from the circumstance that both have 

 been found among drift at Dunbar, especially after storms, 

 it would seem that they extend perhaps into as great if 

 not greater depths than other species. A specimen of 



