GLOSSARY. Teh 
instébilis, fluctuating ; not adhering to the typical form. 
intermédia, varying between two distinct forms. 
tnvoluta, folding inwards. 
tridéscent, coloured like a rainbow. 
Isémya, a sub-order of mollusks with equal adductor 
muscles. 
1b 
te \ with an enlarged lip. 
Zacunésa, with hollows on the surface. 
lactéscens, milky white. 
Jacustris, inhabiting lakes or ponds. 
levigdta, smoothed. 
levis (properly spelt Zevzs), smooth. 
levitiscula, somewhat smooth. 
*/amelléta, furnished with plaits or folds. 
Lamellibrénchidta, an order of mollusks with leaf-like gills. 
*lémina, a plate. 
*/amindta, furnished with plaits. 
lapicida, stone-cutter. 
létior, broader. 
lentiginosa, freckled with markings like those on some 
beans. 
levicoloma, bordered with white. 
leticozona, banded with white. 
