8 



— as "will be further mentioned later — long and broad-leaved on the soft bottom, 

 narrow and short on the hard bottom. When I chose the place, I decided to 

 coUect the material at a depth of 37^, 2V2, IV2 ^^^ V2 fi^s., which was also 

 carried out by m3^self as -well as by the Biologicai Station's fisherman, who accom- 

 panied me on my first expedition in August 1901 and received exact information 

 as to the place and depth. He then uudertook to collect the grasswrack until 

 the Biological Station's steamer left Nyborg in the beginning of March 1902. 

 Then a fisherman at Nyborg was instructed by the Biological Station's fisherman 

 to collect the eel-grass, which he did until he was able to complete the collection 



Table I. 



The channel off Holckenhavn. 



Hard Ijottom, \ — IJ fms. 



in August. The frerjuent change of collectors has unfortuuately caused some un- 

 certainty and heterogeneity in the material and I have thereiore decided to reduce 

 the 4 divisions to 2 accordmg to the nature of the bottom. 



The present tables (Tables I — IV), tlie result of this investigation, contain 

 information which will facilitate the solution of the ijuestions stated above. 



') As the depth on our charts is neai'ly always given in fathom.s I have for practical 

 reasona lieen obliged to n.so thi,s nnity for the investigation; in the following table I give the 

 cijuivalonts of fatlioms in meters: 



