Remarkable for having the termination of the lower whorl quite detached
from the base of the shell.
Shell cylindrical, elongated, a little ventricose in the middle,
generally fusiform, summit obtuse, the last turn smaller than the
preceding; aperture small, irregular, oval; at least one plait,
posterior to the columella, increasing with age so as to be separated,
and forming at the posterior angle of the aperture a rounded sinus.
Clausilia torticollis.
C. truncatula.
C. retusa.
C. costulata.
C. corrugata.
C. inflata.
C. teres.
C. denticulata.
C. collaris.
C. papillaris.
C. plicatula.
C. rugosa.
_C. lævis._ The smooth Clausilia. Pl. 19, fig. 3.
A regular type of this genus.
_C. papillaris._ The pimpled Clausilia.
Pellucid, finely striped longitudinally, the margins of the volutions
papillose; aperture with two plaits; brownish colour.