GLOSSARY, XI 



Dentated, hA\'m^ teeth. 

 Dinphaiioiis, t raiisparcut. 

 Dif/itatedy resembling the fingers. 

 Dorsalf belonging to the back. 



Earsy external projections on the sides of the hinge, {see 

 plate yi' /iff. .5.) 



Effuse, having the hps separated by a gutter. 



EmaryinatCy tiaving the margin excavated by a canal. 



Epidermisy the outer skin or membrane of a shell. 



Equilateraly when the anterior and posterior parts of a 

 shell are exactly similar. 



Equivalve, (apphed to Mullivalves) when the two prin- 

 cipal valves have the same form, size, and position; 

 (to Bivalves), when the two valves are exactly si- 

 milar. 



Exsertedy very thin or slender. 



Fissiircy a notch or slit, as in the Patella Fissura. 

 FiirroWy a gutter or groove running parallel to <hc 



hinge in Bivalves. 

 Fiistforniy spindle-shaped. 



Gapiiif/y (in Bivalves), when the valves do not shut close: 

 (in Univalves), when the lower part of the lips is dis- 

 tended. 



GihhouSy swelled. 



GlahrouSy smooth. 



Hiiif/e, the part where the valves are united, and gener- 

 ally furnished with one or more teeth : it is said to be 

 compressedy when it is formed of one compressed tooth : 

 laLeraly when placed on one side of the shell : refieclcdf 



