Ov ate-lunate 
Palatal 
Parietal 
Paucispiral 
Pedal groove 
Penultimate 
whorl 
Perforate 
Periphery 
Plait 
Reflected 
Roundly lunate 
Sculpture 
Shell 
Shouldered 
Sinistral 
Slug 
Snail 
Gere 
See Fig. 8v. 
Pertaining to the outer lip of a spiral gastropod shell. 
Pertaining to the inner wall of the aperture; the part of 
the body whorl opposite the outer lip (Fig. 4). 
Of few rapidly enlarging whorls orturns (Fig. 8ad). 
A longitudinal groove in the body of a snail that marks 
the boundary where the tuberculate side wall of the foot 
joins the smooth ventral sole (Fig. 7). 
The whorl before the last, or body whorl. (Figs. 4, 6). 
Having a minute opening at the base of the shell (Fig. 8aa). 
The part of a whorl most distant from its central axis. 
A fold on the columella (Fig. 4). 
Turned back (Fig. 8i). 
pee Fig. Su. 
The natural surface markings, other than those of color, 
usually found on snail shells (Figs. 4, 6). 
The hard, usually calcareous, protective covering of 
mollusks (Fig. 2). In some forms, suchas slugs, it is 
vestigial and contained inside the mantle, or lost 
entirely (Fig. 7). 
Having the whorls more or less flat beyond the sutures. 
Wound or spiraled to the left (Fig. 5b). 
A common designation for a snail without an external 
shell. The shell is either rudimentary and inclosed in 
the mantle or wanting entirely (Fig. 7). 
A common designation for a member of the mollusk 
class Gastropoda; the term includes those forms 
commonly called slugs and limpets (Fig. 1). 
