Decollate 
Deeply lunate 
Depressed 
Dextral 
Discoidal 
Embryonic shell 
Epiphragm 
Foot 
Fusiform 
Gastropod 
Globose 
Granulose 
Growth line 
Hirsute 
Imperforate 
Impressed 
Inversible 
Keel 
Lamella 
apy 
Cut off, that is, the top several whorls of the spire 
(Plate I,K). 
See Fig. 8y. 
Flattened, 
Wound or spiraled to the right (Fig. 5a). 
Round and flat like a disk, 
The earliest whorls that are formed in the egg. 
A hardened mucous covering that seals the aperture 
in most land and some fresh-water snails, and pre- 
vents desiccation during dry spells. 
The locomotory organ of mollusks; it is often variously 
modified for digging, grasping prey, etc. In snails it 
is the long, broad, ventral surface of the animal (Figs. 
Zeit Wie 
Shaped like a spindle. 
A member of the mollusk class Gastropoda; a snail, 
slug or limpet (Fig. 1). 
Globular. Formed like a globe; spherical. 
Covered with minute grains or beads, 
A line on the surface of a shell indicating a rest period 
during growth (Fig. 4). 
Covered with hairs (Fig. 6g). 
Lacking a perforation or umbilicus on the ventral or 
anterior end of the shell (Fig. 8ab). 
Marked by a furrow (Fig. 8k). 
Capable of withdrawing by being inverted (Fig. 3c). 
A sharp edge; carina (Figs. 7; 80). 
A fold or raised callus in the aperture of a shell, 
