24 
up with mud and guano, are entirely destitute of fish; but a 
peculiar crustacean, belonging to the group of Phyllopods 
(Polyartemia forcipata), occurs here in large numbers. 
Its nearest relation, the Black-throated Diver (C. arcticus), 
occurs but rarely on the low islands on the coast, but nests by 
preference in the inland lakes in the interior of the country; 
and the Great Northern Diver (C. glacialis), the largest of the 
three, whereof young, non-breeding individuals are met with in 
summer on our southern coasts, perhaps never nests in Norway. 
It is also worth mentioning that the western-arctic Colymbus 
adamst, one of the largest web-footed birds of the North Atlantic, 
and whose proper habitat must be said to be but little known, 
has of late years been brought into our museums several times, 
especially in autumn, from the coasts of Norway; in most in- 
stances from the west and south coasts of the country, though 
some have also been met with on the coast of Finmarken. 
Before we quite leave T and the northern coast regions 
of the country, it will perhaps be of interest to point out which 
species of arctic waders and web-footed birds are never found 
nesting within the boundaries of the country, but appear in large 
numbers during the periods of migration, or at other times of the 
year. 
It is well known, in what large flocks many of the arctic 
species of Tvinga annually appear in the autumn on the west coast 
of Europe. By the middle of August there arrive upon our coasts 
the young of the year of Tvinga canutus (the Knot, sometimes 
called by us the Iceland Sandpiper, or in Jeederen* ‘“‘ Grel”’), and 
of Tvinga subarquata (the Curlew Sandpiper, or in Norwegian, the 
Curved-beaked Stint), in company with Sanderlings (Calidvs 
avenavia) and others. But whence come these hosts in thousands 
and thousands, which gradually disperse themselves over the 
coasts of the North Sea lands? We only know that they come 
from the north, and the exceedingly few cases, in which the eggs 
* Jaederen is nearly the S.W. most corner of Norway, the district between 
Stavanger and Egersund.—77amns/. 
