﻿EXPLANATION OF PLATE XVH. 



Figs. I, 2, 3. I'erticonlia ericia, Hedley. Exterior, hinge 



and magnified sculpture. 

 Fig. 4. V enericardia rosulentu, Tate. 

 Figs- 5) 6) 7» 8. Myrtcea hractea, Hedley. Lateral and 



superior aspects and hinges. 

 9, 10, II, 12. Corbis percostata, Hedley. Exterior 



and interior aspects and hinges. 



