296 C O N C H O L O G V. 



Fig. 15. Another figure of an inarti- 

 culate hinge* 



16. A Chama Pholas, the Spoon^hinge^ 

 fhewn on the in fide, and is a Concha 

 hians^ or a Shell that never fhuts clofe, 

 but is always open or gaping at one end. 



1 7. The Spur Pholas, alfo (hewn on the 

 infide. 



TABULA 



