GLOSSARY. 181 
variety. Varieties are members of a species that deviate 
constantly from the type in form, size, colour, or 
markings. 
ventricosa, 1 swollen 
ventrosa, 
Vertigo, a twist. 
UITESCENS, \ greenish. 
viridans, 
wiridescenti-alba, greenish white. 
wirvidula, greenish. 
zitrea, glassy. 
vitrina, transparent like glass. 
Vivipara, producing young alive. 
vortex, a whirlpool. 
vulgaris, common. 
We 
whorl, a twist of a spiral shell. 
Usp 
sonata, banded. 
Zonttes, like a girdle, i.e., circular. 
