126 LAND AND FRESH-WATER MOLLUSKS. 
with black or brown, from which latter character 
it is known by another name, that of H. fasciolata. 
The dental formula is 25125, It is extremely 
variable in colour, from white to reddish-brown, 
and in the number and colour of the bands. 
It is generally associated with the last species, 
but is not so abundant; it is, however, more 
widely distributed. 
Heurx Cantrana—(the Kentish Snail) (PI. 
VIII., fig. 64)—The shell of this snail is sub- 
globose, thin, semi-transparent, and yellowish- 
white, with atinge of pale rose-colour, especi- 
ally towards the aperture. The margin of the 
aperture is thin and but slightly reflected, and 
at a little distance from its edge is an internal 
thick and white rib; there is a small narrow 
and deep umbilicus ; the whorls are six or seven 
in number; the diameter of the shell is three- 
fourths of an inch. Young shells want the 
internal rib, and are clothed with short hairs, 
which disappear in the adult. The dental for- 
mula is 91-42, 
H. Cantiana is a southern species in Europe, 
and attains its northern limit in England; it is 
indigenous in the south-eastern counties. Itis 
abundant on nettles, and plants in wet places, 
and by ditches in Kent and Sussex, and in the 
counties bordering the river Thames. 
It is plentiful on the downs at Bedminster, &c., 
