24 CONCHOLOGIA CESTRlCA. 



orifice on the posterior, lateral, edge ; foot narrow ; 

 length 4 to 5 inches. 



OBS. An introduced species, from France; found in 

 cellars, in Philadelphia. (Tryon.) And while this work 

 is being printed, it has turned up in a cellar in West 

 Chester, Chester County. Probably a direct importation 

 from France, in connection with her wines. The figure, 

 and description, has been reproduced from the admira- 

 ble edition of Gould's Invertebrata of Massachusetts, by 

 W. G. Binney, Esq. 



Family HELICID^. 

 The Snails. 



Animal of Mesodon palliata. [B. & B.] 



Fig, 13, 



Animal, very similar to the Limacidce ; except the 

 posterior part of the body, which is spiral, and raised 

 off the foot, to be inserted in the shell ; the pulmonary 

 orifice is in the collar, or margin, of the mantle, near 

 the angle of the mouth of the shell ; the anal opening 

 is contiguous thereto. Shell discoidal, sub-orbicular, 

 turbinate, or trochiform. 



OBS. The true snails are oviparous, and hermaphro- 

 dite ; but require the union of two individuals, for 

 reciprocal fecundation. They are both herbivorous and 

 carnivorous. The eggs are usually deposited in places 

 which they inhabit, to the number of fifty, or more. 

 According to Dr. Binney, the depth is regulated by the 

 distance the animal can penetrate the earth, while its 

 shell remains above ground. They are globular, or 

 roundly oval, sometimes slightly connected in bundles, 



