Caesia perpinguis is a species of snail, a marine gastropod mollusk in the family Nassariidae.

The longitudinal striae are nodulous, except towards the base of the body whorl.

The surface of this shell is roughened by a tubercle on the longitudinal, at each intersection of the revolving lines.

It differs from the ordinary form in the presence of two broad spiral bands of a deep chestnut color in abrupt contrast to the grayish-buff ground color of the shell.

[3] This species was found in Magdalena Bay, western coast of Mexico; also in the Persian Gulf.