190 BULLETIN OF THE 



Family AVICULIDiE. 



AVICULA Lamarck. 

 Avicula atlantica Lamarck. 



Family MYTILID^. 



MYTILUS Linne. 

 MytiluB ezustus Linue. 



MODIOLA Lamarck. 



Modiola polita Yerrill and Smith. 

 Modiola opifez Say. 



CRENELLA Brown. 

 Crenella decussata Montague. 



MODIOLARIA Beck. 

 Modiolaria lateralis Say. 



Family ARCID^. 



LIMOPSIS Sassy. 



Limopsis minuta Philippi. 

 Limopsis tenella Jeffreys. 

 Limopsis antillensis DaU. 

 Limopsis cristata Jeffreys. 

 Limopsis aurita Brocchi. 



PECTUNCULUS Lamarck. 



Pectunculus undatus Linne. 

 Pectunculus undatus, var. scriptus Bom. 

 Pectunculus pectinatus Gmelin. 

 Pectunculus pectinatus, var. carinatus Dall. 



ARCA Linn^. 



Area pectunculoides Scacchi. 



Area pectunculoides, var. orbiculata Dall. 



