68 HYGROMIA UMBROSA. 
Geographical Distribution.—H. wmbrosa is another illustration of 
the expulsion of a subdominant or weaker species from an active evolu- 
tionary area, its present known range partially encircling the Germanic 
area, within which it is practically confined to the montane regions. 
In the elevated wooded region of Lauban, Silesia, it has been observed 
to frequent Geranium robertianum. 
H. umbrosa is not known in France, Scandinavia, Italy, or the Iberian 
Peninsula, but it is possible this may arise from oversight. 
BRITISH ISLES. 
Kent E.—Discovered associated with H. striolata in Sept. 1914 on the outskirts 
of Margate, near the depot for the town’s refuse, by Mr. J. C. Dacie. It was previ- 
ously erroneously recorded in the fossil state from the [ghtham fissure, West Kent. 
. t S 
a Q = 
Fia. 97.—Geographical Distribution of Hygromia umbrosa (Partsch). 
Probable Range WRB Recorded Distribution 
GERMANY. 
Distributed in the alps of South and Mid Germany, over the elevated plateaus 
of Bavaria and Suabia, the upper drainage system of the Elbe in Saxony, and the 
Harz Mountains, and has been recorded from Baden, Bavaria, Lusatia, Merseburg, 
Posen, Reuss, Saxony, Silesia, Suabia, Thuringia, Wurtemburg, and Dantzig, 
West Prussia. ; 
AUSTRO-HUNGARY. 
Herr Clessin describes H. wmbrosa as inhabiting the whole region, and it is 
stated to inhabit the entire range of the Austrian Alps, the Erzegebirge, the Iserge- 
birge, the Bohmerwald, the Upper Elbe region of Bohemia, the Danubian valley 
from Regensburg to Belgrade, and the valley of the Save. 
The following countries are specifically recorded as inhabited by this species : 
Austria, Bohemia, Bosnia, Carniola, Carinthia, Croatia, Galicia, Goritz, Hungary, 
Moravia, Salzburg, Servia, Slavonia, Styria, Transylvania, and the Tyrol. 
SWITZERLAND. 
Herr Clessin records that this species is found throughout the country. 
DENMARK. 
Zealand—Recorded by Dr. Mérch from a garden at Bisserup, Holsteinborg ; and 
Herr Steenberg mentions a single fine example (14 mill. x 7 mill.), larger than the 
German shells, found amongst H. strigella at Bisserup Haven by Pastor Jacobsen. 
RUSSTA. 
Poland—Recorded from Ojcow by Dr. Westerlund. 
