6 AMPULLARIA DEPRESSA. 



suture well marked: surface with a tendency to 

 form flattened rounded facets in some indi- 

 viduals: spire somewhat depressed, but differing 

 in different individuals: labrum sharp. 



COLOR greenish-olive or brownish-green, with 

 a series of 10 or 15 olivaceous bands, posterior 

 or apical margin of the whirls more or less 

 yellow; aperture reddish-brown, varying to pur- 

 ple, and banded with a darker tint of the same 

 color. 



GEOGRAPHICAL DISTRIBUTION. Inhabits the 

 river St. John's, according to Say, and is con- 

 fined to a limited tract in southeastern Georgia. 



HABITS. "The animal lives in the canals and 

 ditches of the rice-fields, in which the current 

 is very small and the bottom soft and muddy. 

 The females are oviparous, laying 30 to 70 

 eggs on aquatic plants or sticks (pi. 1, fig. 2) 

 above the line of the water: eggs one-fifth of 

 an inch in diameter, nearly spherical, slightly 

 pointed at one end, covered with a thin cal- 

 careous shell, flesh-coloured when first laid, but 

 passing to a light bluish-grey. The laying sea- 

 son commences about the end of May, and 

 continues during the greater part of the summer. 



