GLOSSARY. 169 
Jidvus, yellow. 
Jiuvidtilts, inhabiting rivers. 
Jonténus :) 
fontinalis J 
foot, a flexible muscular process by which mollusks travel. 
inhabiting springs. 
Sragilis, frail. 
Silva, tawny. 
fiisca, dark brown. 
Juscolabiéta, dark mouthed. 
SJuscescens, dusky. 
Justform, spindle-shaped. 
G. 
gagttes, jet. 
galloprovincidlis, of the Gallic province (Provence). 
Gastropoda, a class of univalve mollusks, the lower surface 
of whose belly forms the foot. 
Genus. In Natural History a sub-division of an Order. 
A genus is sub-divided into species. 
Géomdlacus, earth mollusk. 
gibbosa, swollen. 
gibbous, protruberant. 
Seas \ smooth, 
elibra, 
globosa, globose. 
glutinosa, sticky, slimy. 
grédcilis, slender. 
graciltor, rather slender. 
grandis, large. 
