ORDER PULMONARIA. 29 
In the terrestrial pulmonaria with complete and apparent 
shell, the edges of the aperture are most frequently raised like 
a pad in the adult. 
Linneus refers to his genus 
HELIX, 
All the species in which the aperture of the shell, a little 
intruded upon by the projection of the last whorl but one, thus 
assumes a circumscribed and crescented form. 
When this crescent of the aperture is as broad, or broader 
than it is high, they are 
HELIX (properly so called), Brug. and Lam. 
Some have the shell globular. In this number, every one 
knows the common snail (Hel. Pomatia, L.), common in gar- 
dens, vineyards, with reddish shell, marked with paler bands, 
a food very much in request in some places; and H. nemo- 
ralis. L., with a shell diversely and vividly coloured. In wet 
seasons it 1s very injurious to wall-fruit. 
Add Helix glauca, Citrina, Rapa, Castanea, Globulus, 
Lactea, Arbustorum, Fulva, Epistylium, Cincta, Ligata, 
Aspersa, Extensa, Nemorensis, Fruticum, Lucena, Vittata, 
Rosacea, Itala, Lusitanica, Aculeata, Turturum, Cretacea, 
Fuscescens, Terrestris, Nivea, Hortensis, Lucorum, Grisea, 
Hemastoma, Pulla, Venusta, Picta, Gm., &c. 
There is no one who has not heard of the curious experi- 
ments which have been made on the reproduction of their 
amputated parts.—Consult Spallanzani, Scheeffer, Bonnet, &c. 
Others have the shell depressed, that is, with flatted spire. 
Such are Hel. lapicida, H. cicatrosa, H. egophthalmus, H. 
albella, &c. 
Among them some may be remarked that have ribs project- 
ing interiorly, Hel. sinuata, H. lucerna, &c. 
And particularly those in which the last whorl is suddenly 
