of the Land and Fresh-water Shells of Suffolk. 165 
intermingled with herbs of as dry a texture. And as in the 
Sahara the variety of Land-snails afford nourishment to the 
Ostriches, so may they here serve in part to sustain the various 
species of water-fowls, which at stated periods resort hither and 
to the surrounding creeks and marshes in great abundance ; for, 
as some water-fowls ( Eider and Scoter Ducks, for instance,) feed 
on the animals of water-shells, others may do so on the land- 
shells. 
One observation more respecting the Walton Helices may per- 
haps be thought worthy to be mentioned; viz. that lying exposed 
to the sun, with scarcely any shelter, a great proportion of them 
have their upper surfaces more or less tinged with a beautiful 
pink or rose colour; and that this colour is really occasioned by 
the sun is the more probable, their under parts retaining that 
which is natural to them. 
56. HELIX nortensts. Montagu Test. Brit. p. 412. 
H. nemoralis à. Trans. Linn. Soc. vol. viii. p. 207. 
Frequent in hedges at Offton, Holbrook, Higham, Stoke by 
Nayland, and Ipswich; in Friston wood. - 
Of much rarer occurrence in Essex, but is occasionally found 
in Ramsey near the Stour; and in hedges bordering the Har- 
wich road, néar Dovercourt turnpike gate. 
Young shells, when minute, are scarcely to be distinguished 
from those of the preceding species. 
The H. hortensis, as well as the preceding, is divided into the 
plain, the single-banded, and the many-banded, each of various 
colours ; and if future observation should prove that they confine 
their amours to their respective kinds, and that their Spicula are 
different, then ought fhey also, in my opinion, to be established 
as distinct species. 
59. Her- 
