place concerned. In deep waters the collections have always been made with a dredge 
where nothing else is indicated. In most other places an otter trawl has been employed. 
As the markings on the charts and in the list show, there was no vegetation 
at all in the southern part of the North Sea area even where the bottom was stony. 
This agrees with what earlier German investigations have shown! and what I myself 
found in 1905 at Horns Reef (Part I p. 22, Chart II). Further it was in accordance 
with what Dr. Johansen had found immediately before my arrival onboard the Dana. 
In thirty localities between 6°07’ and 8°16’ E. and between 55°00’ and 56°08’ N. on 
fishing with otter trawl no vegetation at all was found. It was confirmed, then, by these 
investigations that this part of the North Sea is a veritable desert as regards bottom 
vegetation. In the northern part of the North Sea area, where there were stones or 
at any rate gravel in nearly all the localities examined, the bottom was almost 
equally bare, being either entirely destitute of vegetation or showing only very sparse 
vegetation. This result may, however, be partly due to the late season (the latter 
part of September) for I have formerly found a fairly abundant flora in some parts 
of this area at the close of July. In the Skagerak, too, the vegetation is on the whole 
very poor even on stony bottom, and only in a few places, mostly near land, do 
we find spots with continuous vegetation, especially at Hirshals, but also at Hanst- 
holm, Bragerne and Lonstrup. On the other hand, in the Skagerak one often comes 
across loose, drifting Algæ carried along by the strong current. 
On groins and breakwaters in the northern part of the North Sea area there 
is an abundant and fairly varied vegetation. At Fanø and Esbjerg the corresponding 
vegetation is poor in species and, according to- REINBOLD? and Jaap,® the same is 
the case with the Algz vegetation on the coasts of Rømø and on the west coasts 
of North Slesvig; I myself had no opportunity to examine Rømø until August 1923. 
In the shallow sea between North Slesvig and the islands Zostera marina and Z. nana 
grow in low water, but there seem to be no Algæ. Mag. R. SpARcK who made dred- 
gings along the east coast of Fanø at a depth of 4—5 m. has kindly informed me 
that he got numerous oyster shells and mussel shells and not a few stones in the 
dredge, but that there was no Algæ vegetation. Only a little loose Fucus vesiculosus 
without vesicles and some Zostera got into the dredge. 
The waters washing the eastern coast of North Slesvig are so similar in char- 
acter to the adjoining parts of the Little Belt and the western part of the Baltic 
dealt with in Part I, that they do not require further mention here, the more so 
since they have been treated in REINKE’s above cited work. The depth conditions are 
shown on Chart II and in map p. 290. 
1 J. REINKE, Notiz über die Vegetationsverhältnisse in der deutschen Bucht der Nordsee. Bericht 
deut. bot. Ges. 1889 p. 367. TH. REINBOLD, Untersuchung des Borkum-Riffgrundes. Sechster Bericht d. 
Komm. z. wiss. Unters. d. deutsch. Meere. III Heft. 
? Tu. REINBOLD, Bericht über die im Juni 1892 ausgeführte botan. Untersuch. einiger Distrikte der 
Schleswig-Holsteinischen Nordseeküste. Sechster Bericht d. Komm. z. wiss. Unters. d. deutsch. Meere. III Heft. 
® O. Jaap, Zur Kryptogamenflora d. nordfriesischen Insel Rom. Schrift. d. Naturv. Vereins d. Prov. 
Schleswig-Holstein Bd. 12. 1902. 
