EXPLANATION OF PLATES. 



FRONTISPIECE. 

 lanthina and float. 



Fig. 1. JRissoa parva. 



2. Barleeia rubra. 



3. Jeffreysia diaphana. 



PLATE I. 



Fig. 4. Skenea planorbis. 



5. Homalogyra atomus. 



6. Ccecwn trachea. 



PLATE 



Fig. 1. Turritella terebra. 



2. TruncateUa truncatula. 



3. Scalaria communis. 



Fig. 4. Aclis sitpranitida. 

 6. Odostomia spiralis. 



Fig. 1. lanthina rotundata. 



2. Stilifer Turtoni. 



3. Eulima polita. 



4. Natica catena. 



PLATE HI. 



Fig. 5. Adeorbis subcarinatus. 



6. Lamellaria perspicua. 



7. Velutina Icevigata. 



END OF VOL. IV. 



PRINTED BY TAYLOR AND FRANCIS, RED LION COURT, FLEET STREET. 



