Borsonia bifasciata Pease, 1860 Kermia bifasciata is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

(Original description) The fusiform, shining shell is longitudinally coarsely ribbed (14 on the body whorl) and crossed by coarse raised striae.

The outer lip is thick, incurved, serrated on the edges at the termination of the transverse striae.

The siphonal canal is short and slightly recurved.

[3][4] This marine species occurs off Hawaii and Easter Island and French Polynesia; also in the Red Sea.