the base grooved, but not channelled ; the lip crenulated, 

 and tumid on the inner side ; folds or teeth on the columella. 

 Recent. PI. iv. fig. 6. 



32. Marginella. An oval univalve, with a short spire ; 

 lip with a thick border; base slightly grooved; columella 

 plaited. Recent and fossil. PI. iv. fig. 7. 



33. Cancellaria. An oval and subturretted univalve; 

 lip transversely grooved on the inside ; base slightly notched, 

 sometimes entire ; columella with sharp but compressed 

 plaits. Recent and fossil. PI. iv. fig. 8. 



34. Fasciolaria. A subfusiform univalve ; the base 

 grooved ; no projecting sutures ; columella with two or three 

 very oblique folds. Recent. PL iv. fig. 9. 



35. Turbinellus. A subfusiform univalve; the base 

 grooved ; with from three to five compressed transverse 

 plaits on the upper part of the columella. Recent. PL iv. 

 fig. 10. 



36. Buccinum. A suboval univalve ; opening oblong, 

 notched at the base, but not channelled ; columella convex 

 and full. Recent and fossil. PL iv. fig. 11. 



37. Eburna. A suboval univalve ; the lip thick ; open- 

 ing oblong and grooved at the bottom ; the columella umbi- 

 licated and slightly grooved at its base. Recent and 

 fossil. PL iv. fig. 12. 



38. Terebra. A longish turriculated univalve ; the open- 

 ing about one third of its length, notched at its base ; colu- 

 mella terminating obliquely. Recent and fossil. PL iv. 

 fig. 13. 



39. Dolium. A ventricose, nearly globose univalve ; 

 ribbed transversely ; the lip ribbed through its whole length ; 

 the opening wide, notched at the bottom. Recent. 

 PL iv. fig. 14. 



40. Harpa. An oval and ventricose univalve, with longi- 

 tudinal compressed ribs terminating upwards in an angle or 



