LAND SNAILS. bau 
but not reflected lip. The animal resembles 
that of Bulimus. The genus contains only one 
British species— 
Zua Luprica—(the Common Varnished Shell) 
(Pl. IX., fig. 84).—The shell is glossy, of a brown 
or yellowish colour, sometimes greenish-white ; 
about one-fourth of an inch long, usually of an 
oblong, cylindrical shape, but subject to some 
variation in shape and colour. 
It is common and generally distributed; in- 
habits woods, among decaying leaves and wood, 
at the roots of plants, and on mossy banks and 
swards. It is a favourite food of the starling. 
It is a fossil of the Newer Tertiaries of Grays, 
Clacton, Copford, &c. 
A North American species, Zua lubricoidea 
(Stimpson), has been unhesitatingly referred to 
the common Huropean species by all concho- 
logical writers, with the exception of two— 
Stimpson, who named the species as above, 
deeming it impossible that an introduced species 
could have spread so generally over the American 
Continent; and Morse, who has shown, during 
the past year, that certain marked aiid constant 
characters plainly indicate the distinctness of 
the species. Slight differences in colour, size, 
and number of whorls may be pointed out, as 
also differences in the lingual dentition; that of 
Z. lubrica being 2°+2° ; of the American species, 
