A. acicula.
A. Virginea. The Virginian Achatina.
Smooth, conoid, with aperture almost round; very short, grayish white, with red and black transverse bands; columella rose-coloured, with one plait; volutions ventricose; inside of the lips bluish; a transverse callosity in the interior.
A. zebra. The zebra Achatina. Pl. [18], fig. 1.
Species thin, oval, sub-ventricose, spire prominent, striped like a zebra.
A. glans. The acorn Achatina. Pl. [18], fig. 2.
Species sub-turriculated, of which the last whorl is attenuated anteriorly.
A. columnaris. The columnar Achatina. Pl. [18], fig. 3.
Species evidently turriculated.