Northia is a genus of large sea snails, marine gastropod mollusks in the subfamily Photinae of the family Nassariidae.

[1] The shell is elongated, turreted and polished.

The spire is elevated, acuminated with whorls depressed and sloping at their upper part.

The outer lip shows the margin serrated.

[2] According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus Northia  :[1] Media related to Northia at Wikimedia Commons