CLy\SS III.— GASTEROPODA. 



xlvii 



CLASS III.— 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. Pectinabrancliiata 



7. Scutibranehiata 

 \8. Cyclobranchiata 



ORDER I. Pulmonaria. 



These mollusca breathe by a sort of internal lungs, instead of 

 gills. It is composed of the following genera. 



Faviily. 



p 





Genus. Suhgemis. Example of Species. 



1. Limax, prop. Cuv. . . 



2. Arion, Ferussac .... Lim. rufus, L. 

 Limax, L. J 3. Limas, Ferussac .... Lim. maximus, L. 



Slus ....]'*• Vaginulus, Ferussac .Vag. Taunaisii, Ferus. 



'"***' 5. Testacella, Lam Test, haliotoidea, Draparn. 



6. Parmacella, Cuv Farm. Olivien, Cuv. 



II. Helix, L . 

 Snail . . , 



'1. Helix, prop, i?)-?^^.) tt i .• t r.7-7. 



& Lam ( pomatia, L. Edible snail 



am. ^ 



1, > Hel. pellucida, Miil 



Vitrina, Draparn. 

 Helico- Limax, 

 Feruss, 



3. Bulimus,prop.Za»..-f"'^'-'^f°"^t^'^""- truncated 



4. Pupa, Lam Bui. labrosus, Oliv. 



5. Chondrus, Cuv Bui. zebra, Oliv. 



G. Succinea, Drap Sue. amphibia, Drop. 



III. Clausilia, Drap -f^"''^° perversus, L. Reversed 



' ^ y wreath 



KlY. Achatina, Lam. /Bulla achatina, Chemn. Broad 



^ ( striped dipper 



