Likewise taken from the Helix of Linnæus.
Shell fluviatile, covered with epidermis, oval, oblong; spire slightly
pointed, more or less turreted; the margin of the whorls often
surmounted by spires; aperture oval, entire; columella smooth and
arched; closed by a thin, horny, complete operculum.
Melania asperata.
M. truncata.
M. coarctata.
M. punctata.
M. corrugata.
M. subulata.
M. lævigata.
M. clavus.
M. decollata.
M. amarula.
M. thiarella.
M. spinulosa.
M. granifera.
M. carinifera.
M. truncatula.
M. fasciolata.
_M. amarula._ The crowned Melania. Pl. 20, fig. 3.
Covered with a black epidermis, under which the colour is deep chestnut;
ovate oblong, with the whorls transversely keeled and coronated with
triangular tubercles, from which emanate ciliated spines.