LIMN^US. 
209 
Leach Jeffreys^ Linn. Trans, xvi. 276. — -Limneus tinctus. 
Jeffreys.)^, c. 378 — 392. 
Yar. 1., apex decollated. Mag, N. Hist. vii. 161. f. 32.; 
Linn. Trans, viii. t. 5. f. 8, (See fig. 49 p. 200.) 
In marshes and ponds. 
Animal yellow-brown or cinereous^ speckled with 
lighter colour. 
Shell three quarters of an inch long, brown horn- 
colour, rather opaque, suddenly sloping in Fig. 5i. 
a conic manner, the volutions hardly raised, 
slightly striate longitudinally, and crossed 
with more remote transverse ones, like the 
facets of cut glass ; aperture oval, cover- 
ing nearly half the shell, often chocolate- 
brown and glossy in the inside, sometimes 
rosy about the pillar, where the peristome L.palustns, 
is spread and glossy, forming a slight umbilicus. 
These shells vary very greatly in size ; in their 
colour, from pale brown to dark violet brown, and 
especially the colour of the throat, which is rarely 
bright violet brown; in the thickness of the sub- 
stance of the shell ; and in the shape, occasioned by 
the different degrees of the ventricoseness of the 
whorls. 
The smaller specimens often have their tips trun- 
cate. (See fig. 49.) Mr. Alder thinks that var. /?. 
of Mr. Jeffreys, which is found in rivers, frequently 
in the tide-way, and never has the size of those 
found in ponds, is intermediate between L. palustris 
and L. fossarius. Probably the small size is pro- 
duced by the current not allowing the animal its 
usual rest ; we often regard a different habitation as 
p 
