Specific Character.
A. testâ globosâ, ferrugineâ, lineis transversis subcarinatis instructâ aperturæ margine tenui; umbilico magno; operculo corneo?
Shell globose, ferruginous, with obsolete transverse subcarinated lines; margin of the aperture thin; umbilicus large; operculum horny?
The only species of Ampullaria with which this may be confounded is A. fasciata, p. 103, in comparison with which it is a more globose shell, the aperture narrower, and the spire more obtuse; the umbilicus is larger, round, and not contracted; the suture is not sunk, the shell is not banded with coloured lines, nor is the surface smooth; on the contrary, it is marked with transverse, obscurely carinated lines; while the shell is uniform brown, the aperture within is white, margined with brown.
AMPULLARIA puncticulata
Oval, punctured Apple Snail
A. testâ ovatâ, subtilissimè punctatâ; spirâ obtusâ; labii exterioris margine, interiorisque basi rufis, incrassatis; operculo corneo?
Shell oval, minutely punctured, spire obtuse; margin of the exterior lip within, and base of the inner lip thick and rufous; operculum horny?