156 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
MODIOLARIA LAEVIGATA Gray. 
Fig. 14. Length, 54 mm. 
Margin of the mantle pale green, anal syphon prominent and 
turned dorsally, branchial syphon sharply defined with edges 
Fig. 14. — Modiolaria laevigata Gray. 
thrown into sharp scallops. Light brown in color, mottled with 
cream white spots, edge yellowish brown. 
ANATINA PAPYRACEA Say. 
Fig. 15. Length, 15 mm. 
The creature is very timid and sluggish. A specimen was 
kept in a dish of sea-water, often changed, for four days before 
Fig. 15. — Anatina papyracea Say. 
