128 HYALINIA FULVA. 
Geographical Distribution.—//. /ulva has an enormous range, being 
widely disseminated throughout the boreal and temperate areas of the 
Holaretic region, and has been introduced into Australasia. 
It is widely dispersed throughout the British Isles, and though probably 
existing in every division, has never been recorded for the Hebrides or the 
Shetland Isles. 
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Fie. 175.—Geographical Distribution of Hyalinia fulva (Miller). 
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Probable Range. Ms Recorded Distribution. 
In its typical form it extends over Europe and the northern parts of 
Asia, its range extending northwards well within the Arctic Cirele, while 
in the south it extends into North Africa, and in Asia as far as Cash- 
mere, and eastward to the extreme confines of the continent and Japan. 
In the New World the real equivalent of the present species, according 
to Pilsbry, is the Helix egena of Say, which was described from examples 
found in the suburbs of P hiladelphia, and is widely dispersed over Canada, 
the northern half of the United States and along the whole Pacific coast 
of North America, as far as 'l’epec in South California, and appearing in 
‘'exas in an intermediate form, linking the type with the HZ. chersina of 
Say, which still occupies the south-eastern states. 
In the Rocky Mountains and California it is chiefly confined to the 
elevated regions, and is apparently absent from the intervening arid 
ground, the specimens seem nearly typical fwlea, although somewhat 
diverging forms are present. 
According to Sandberger, specimens in his collection from the alpine 
districts are loftier in the spire and of lesser diameter than those from the 
plains, conforming in this respect with the more primitive American form 
H. chersin«, and Herr Clessin records the same peculiarity in the examples 
from Kutais in ‘Transcaucasia, 
