20 



The Sams0 area. Sa. The boundary towards the Little Belt is a line from 

 JEhelo to Bjornsknude and towards the Great Belt a line from Fyens Hoved 

 to Refsnses Point. 



The Little Belt (Lillebselt). Lb. The boundary to the south is a line from 



Pols Huk on Als to Vejsnses on JEvq, and towards the South Fyen waters a 



line from Hornenaes to Skjoldnses. 

 The South Fyen waters (Sydfynske 0gaard). Sf, The boundary towards 



the Great Belt is a line between Turo Reef and Nses Hoved on Langeland. 

 The Great Belt (Storebeelt). Sb. The boundary to the south is a line between 



Gulstav at Langeland and Kappel church on Lolland, towards the Smaaland 



Sea a line from Korsor passing Egholm, Agers0, Omo and the south-westerly 



Omo Staal Grund lo the eastern point at Onse Vig in Lolland. 

 The Smaaland Sea. Sin. The boundary towards the Baltic oft" Gronsund is 



a line round Tolken , towards the Baltic off the Bogestrom a line round the 



sand shallows to the Begestrom buoy. 

 The Sound (0resund) Sll. The boundary towards the Baltic oft' Gronsund is a 



line from the south point of Amager eastward. 

 The western Baltic. Bw. To a line between Gjedser and Darsserort. 

 The Baltic round Mo en. Bra. To a line from the north end of Riigen 



northward. 



The Baltic round Bornholm. Bb. The waters surrounding Bornholm. 



Remarks on the dredging localities. 



1 iiave considered it useful to make a list of all the localities where I have 

 dredged and to give information about the depth, the nature of the bottom and 

 the vegetation at each. They are also indicated on the accompanying charts by 

 signs, illustrating the vegetation. By means of this it will be possible in the fol- 

 lowing to give a detailed account of the occurrence of the single species in the 

 Danish waters without too great prolixity, and, by means of the list and the charts, 

 to contribute perhaps to the characterization of the separate waters with regard to 

 the vegetation, even if the dredging localities are not so near each other, that they 

 can serve as base for a chart showing the distribution of the vegetation. To obtain 

 this, much more numerous observations than I have been able to make are ne- 

 cessary. The Danish waters are so complicated, and the nature of the bottom 

 often so variable from place to place, that it is not possible, from the dredging at 

 one place to draw conclusions as to the conditions at another close by. It may 

 also be remembered, that the aijn of my investigations was not so much to de- 

 termine, to what extent the bottom was overgrown, as to study the distribution 

 and the mode of occurrence of the single species. That is why 1 have usually 

 preferred to dredge at places where I could expect the bottom to be overgrown. 

 If the result has nevertheless been, that so great a number of the dredging lo- 

 calities have proved to be without vegetation, the reason is, that a relatively large 



