174 GLOSSARY. 
attidulus, rather shiny. 
nitidus, shiny. 
niicleus, the tip of a spire of a univalve. 
O. 
obésa, swollen. 
obliterdta, markings absent ; (refers to colour). 
oblonga, oblong. 
obscurus, hidden. 
obtusélis, blunt. 
obvolita, wrapped up. 
ochroletica, whitish-yellow. 
ochracea, yellow. 
bctodentéta, with eight teeth. 
olivdécea, olive-colour. 
opérculated, furnished with an operculum. 
opérculum, a covering or lid. A hardened plate attached 
to the foot of the animals of many univalves, which 
closes like a door when the animal withdraws into 
the shell. 
Order. In natural history the sub-division of a Class. 
orifice, a hole. 
orndéta, ornamented. 
ovals, \ 
- oval. 
ovéta, J 
oviparous, producing eggs. 
évoviviparous, producing eggs which are hatched internally. 
