OF CONCHOLOGY. 121 



PJLATE Y. 

 To illustrate the Genera. 



MULTIVALVE SHELLS. 



Fig. 1st. Chiton Marginatus. 

 2nd. JLepas Tintinnabulum, 

 3rd. Pholas Crispatus. 



BIVALTE SHELLS. 



Fig. 4th. Mya Arenaria. 



5th. Solen Ensis. 



6th. Tellina Donacina. 



7th. Cardium Edulis. 



PJLATE VI. 



Fig. 8th. Mactra Lutraria. 

 9th. Donax Trunculus. 

 10th. Venus Aurea. 

 11th. Spondylus Gsederopus.*^ 



Those shells marked * are foreign. 

 R 



