26l 



SPECIES 



G E N V S X Y 1. 



PELORIDERMA . 



Peloriderma Vulgare. 

 Peloriderma Cristatum . 

 Peloriderma Denticulatum . 

 Peloriderma Cochlear. 



Ostrea Edulis Linn. 

 Ostrea Cristata Born. 

 Ostrea Denticalata Born. 

 Ostrea Cochlear ''^. 



GENVS XVI L 



SPECIES 



ECHIONODERMA. 



Echionoderma Caepa. Anomia Caepa Linn. 



Echionoderma Ephippium . Anomia Ephippium Linn. 



Echionoderraa Margaritaceum. Anomia Margaritacea . 



Echionoderma Sulcatum . Anomia Sulcata . 



Echionoderma Pectiniforme. Anomia P ectiniformis . 



Echionoderma Squamula. Anomia Squamula Linn. 



GE.NVS XVIIL 



GRIOPODERMA. 



iL Criopoderma Turbinatum . Anomia Turbinata . 



II. Criopoderma Truncatum. Anomia Truncata Linn. 



IIL Criopoderma Caput Serpentis. Anomia Caput Serpentis Linn. 



Quae ad Univalvia, et ad ahquot ex MultivalTibus spectant, in fine Tomi III 

 oportunius exponemus. 



