CLASS III.— GASTEROPODA 
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CLASS IIL— GASTEROPODA. 
Includes the reptilious mollusca. They are naked or testaceous, 
though all the latter have not a shell large enough to take in the 
body of the animal. The class is divided into eight orders, viz : — 
Class. 
Gasteropoda 
Order. 
1. Pulmonaria 
2 . Nudibranchiata 
3 . Inferobranchiata 
4. Tectibranchiata 
5. Heteropoda 
6. Pectinabranchiata 
7. Scutibranchiata 
8. Cyclobranchiata 
ORDER I. Pulmonaria. 
These mollusca breathe by a sort of internal lungs, instead of 
gills. It is composed of the following genera. 
Family. Genus. Subgenus . Example of Species* 
1. Limax, prop. Cuv. . . 
2. Arion, Ferussac . . . . Lim. rufus, L. 
3. Limas, Ferussac .... Lim. maximus, L. 
4. Vaginulus, Ferussac .Vag. Taunaisii, Ferus. 
5. Testacella, Lam Test, haliotoidea, Draparn. 
6. Parmacella, Cuv Parm. Olivieri, Cuv. 
L H & h W.°. P ! .^75.*} HeL P omatia > L * Edihle snail 
2. Vitrina, Draparn. 'i 
Helico-Limax, >Hel. pellucida, Miil. 
Feruss j 
3. BuIimus,prop.7;am.{ He s I ) ; a < ]f ol,ata ’ Gm ' 
4. Pupa, Lam Bui. labrosus, Oliv. 
5. Chondrus, Cuv Bui. zebra, Oliv. 
6. Succinea, Drap Sue, amphibia, Drop. 
III. Clausilia, Drap. { 
IV. Achatina, Lam. 
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I. Limax, L. 
Slug . . . 
II. Helix, L.. 
Snail ... . 
