- —_ = * 
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a a a 
VOL. XIV. (1) FOREST BED—PALHONTOLOGY 37 
Succinea elegans, Risso. Common. This form is 
known from the Icenian of Coltishall, Norfolk ; and from 
the Amstelian of Holland. It ranges throughout Europe, 
Siberia, Turkestan, and as far as Tibet. 
Carychium minimum, Mill. Six examples. A common 
European species. It is known from numerous Post- 
Pliocene beds. 
Ancylus fluviatilis, Mill Common. This form is 
abundant in most Post-Pliocene beds. At the present 
day it ranges throughout Europe, and has been recorded 
from Madeira and the Canaries. 
Velletia lacustris (Miill.) One example. It is equally 
common in these recent beds as the last species, whilst 
it lives throughout Europe, and ranges as far as 
Turkestan. 
Limnea pereger (Mill) Abundant. This form has a 
circumpolar distribution, and is known from Afghanistan 
and Kashmir. It is an ancient form occurring in the 
Butleyan of this country, and the Upper Pliocene of 
Castellarquata, near Piacenza, Northern Italy. 
Limneza palustris (Mill). One example. This species 
has nearly as wide a range as the last, whilst it also occurs 
in Morocco. It is known from the Butleyan and the 
Icenian of this country. On the Continent it is first 
recorded from the lower Pleistocene of Mosbach. 
Limnga truncatula (Mill.) Common. Having as wide 
a distribution as the last species; it is also known 
from Butleyan and Icenian, and its first appearance on 
the Continent is also from the lower Pleistocene of 
Mosbach. 
Limnea stagnalis (Linn.) One example. This form is 
circumpolar in its distribution, but its earliest record is 
from the Cromerian (Forest bed). It is common in beds 
of later age. 
Planorbis nautileus (Linn.) Two examples. This common 
