120 
HELICIDiE. 
Shell the tenth of an inch in diameter ; aperture 
nearly circular, being very little interrupted by the 
penultimate volution; the peristome margined and 
flat ; umbilicus large and deep. 
The specimens found in marshy damp situations 
are marked with elevated cross bands, which are the 
vestiges of former mouths. Those that are found in 
dry situations, under stones, in shells, &c., are gene- 
rally destitute of any such ribs. 
M. Kickx has proposed once more to separate H, 
costata from H. pulchella specifically, on the ground 
of a difference between the animals. He describes 
the animal of H. pulchella as milk-white ; mantle 
yellowish ; lower tentacles very short ; ” and H, cos- 
tata as rufous; mantle violet; lower tentacles 
scarcely visible.” This difference does not exist in 
the English specimens examined by Mr. Forbes or 
myself, the animal of both varieties agreeing with 
the description given above of FL pulchella. 
This species is also found in North America, 
according to Ferussac. 
g. Shell subglobose^ perforated or umbilicated^ white 
or reddish^ varied with bands ; peristome edgedy 
not spread; periostraca thin^ bald; epiphragm 
membranaceous. Jaw strong y costated in front y 
and toothed on the edge. (Heliomanes Ferussac,^ 
43. 10. pisana. Banded Snail. — Shell sub- 
globose, with the larger volution rather flat at 
top, marked with numerous brown and yellowish 
often interrupted bands; the mouth rounded 
lunate; throat mostly rose-colour, (t. 4. f. 30.) 
