Pl. 9.

AMPULLARIA Pl. 1.
A. carinata.

AMPULLARIA carinata.

Carinated Apple-snail.

Family Ampullaridæ.—Guild.

Generic Character.

Pachystoma. Shell ventricose; margin of the lip thick, generally grooved; operculum testaceous. Zool. Journ. 12. p. 536.

Specific Character.