449 
the apparatus a few times in the Limfjord and later on in the 
Great Belt, from the “Japetus Steenstrup”, the steamer of the 
Danish Biological Station. This summer (1925) on a trip from Ny¬ 
borg to Bornholm with the “Japetus Steenstrup” I had a much 
better opportunity of testing the apparatus, using it on a series of 
stations at various depths, down to 94 Meters. The result was so 
excellent that I have thought it my duty to publish this descrip- 
tion of the apparatus in order to call the attention of other biolo- 
gists to this method of securing material of the smaller bottom- 
dwelling organisms. 
The organisms found were especially Nematods, Planarians and 
small Annelids; further Ostracods and bottom forms of Copepods; 
likewise small Molluscs, especially young Bivalves. The Baltic having, 
as well known, through its character as a brackish sea, only a 
very poor fauna, the result was, in faet, rather beyond expectation. 
There is reason to mention especially the somewhat unexpected 
discovery that the stinking mud from the greater depths N. E. of 
Bornholm (c. 80—90 Meters) proved to contain quite a rich fauna 
of Nematods (but very few other animals). , Further it may be 
mentioned that Echinoderes was found to be quite common both 
in the Limfjord and the Great Belt. — That the use of this appa¬ 
ratus in richer localities will yield a very rich harvest in all sorts 
of small bottom-organisms cannot be doubted. To the above named 
groups will be added especially Cumaceans (found in great num- 
bers by using the apparatus on sandy bottom in the Great Belt), 
Amphipods, Foraminifera, young Echinoderms etc. Especially we 
may look forward with the greatest expectations to using this 
apparatus in tropical seas. 
As for using it in deep water this would hardly offer any 
special difficulties. Using it in a depth af 94 Meters in the Baltic 
proved to be very easy, and I do not see why it should be more 
difficult to use it in much greater depths. It will only be neces- 
sary to attach a heavier lead on the line some distance before 
the apparatus in order to make sure that the light apparatus really 
follows the bottom. This lead also makes it easier to feel with the 
hånd on the line, when the apparatus has reached the bottom, and 
if it follows the bottom. I have therefore found it practical to attach 
Vidensk. Medd. fra Dansk naturh. Foren. Bd. 80. 
33 
