Report U. S. F. C. 1897. (To face page 340.; 



Plate XVIll. 



Fig. 1. "Quarter-decker," Crepidula fomicata. 

 Fig. -2. -'Quarter-decker," Crepidula x>lann. 

 Fig. 3. "Quarter-decker," Crepidida convexa. 

 Fig. 4. Jingle, Anomia glabra, profile view. 

 Fig. 5. The .same, lower side. 

 Fig. 6. Scallop, Pecfen irradian.i. 

 Fig. 7. Oyster attached to pebble. 



