STEJNEGER] ANIMALS AND PLANTS OF NORWAY 493 
fauna corresponds exactly to the Atlantic group of plants, as shown 
by Sparre Schneider.* 
The terrestrial isopods seem to possess means of rapid dispersal, 
and many of them probably owe their present wide range to the 
agency of man. An exception is apparently furnished by Ligyda 
(= Ligia) oceanica (Linneus) which lives near the water’s edge 
on exposed saltwater beaches. “ Along the western coast of Nor- 
way this form” according to Sars (Acc. Crust. Norway, 1, 1899, 
p. 157) “occurs rather plentifully and extends northwards at least 
to the Trondhjem Fjord,” while outside of Norway it is found on 
the coasts of “ Denmark, Prussia, Belgium, France, Spain, Britain, 
Feerce Islands.” It is consequently an eminently “ Atlantic” species, 
and there can be but little doubt that it has come to west Norway 
from Scotland. It can hardly be said to prove a land connection 
at any time, however, since it appears probable that it might be 
easily caried across salt water by currents for such a distance as the 
width of the Norwegian channel, though it is uncertain whether it 
could cross the North Sea at its present level. 
The earthworms might furnish excellent tests for the presence 
of a land bridge, were their distribution known in greater detail and 
were we assured that they are not introduced recently by man. All 
the species thus far recorded from Norway” belong to the group 
which Michaelsen characterizes as ‘‘ Weitwanderer,”’ with the ex- 
ception of an indigenous species, Helodrilus (Bimastus) norvegicus, 
which has been found in Suldal, Nordreisen, and Tromsce. Michael- 
sen, however, regards it as a form of comparatively recent origin 
and doubtfully distinct specifically from H. (B.) constrictus which 
also occurs there. Of the thirteen species recorded by him from 
Norway nine occur about Kristiania and Drammen in the eastern 
part of the country, while four are reported from the western and 
northern coast only. Of these Helodrilus (Allolobophora) longus 
has only been found at Stavanger and may, therefore, be a recent 
"Coleoptera og Lepidoptera ved Bergen og i nermeste omegn (Bergens 
Mus. Aarb., 1901, No. 1). On pp. 20-21 he enumerates 31 “ Atlantic” coleop- 
tera, 4 hemiptera, and 23 lepidoptera. On p. 9 he calls attention to the 
British bumblebee, Bombus smittianus, which also occurs along the extreme 
western coast of Norway from Jederen to Lurce in Nordland (66%4° north 
lat.), and on p. 161 to the noctuid moth, Aporophyla nigra, which occurring 
at Bergen, but not in Denmark, Sweden, or Finland, furnishes among the 
lepidoptera “one of the most important proofs of the originally close con- 
nection between the British Islands and southwestern Norway.” 
?\W. Michaelsen, Die Lumbriciden-Fauna Norwegens und ihre Beziehungen, 
in Verh. Naturw. Ver. Hamburg (3), 1X, 1902, pp. I-13. 
