Pyrgocythara hemphilli is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

The suture is distinct, appressed, with a nodulose band in front of it where the ends of the ribs are cut off by a very narrow fasciolar constriction.

On the body whorl there are six or seven of these lines, with much wider interspaces, followed by three strong cords close-set on the siphonal canal.

The axial sculpture consists of (on the body whorl about 13) protractively oblique whitish narrow ribs extending from the fasciole to the cords of the siphonal canal, with subequal interspaces and not continuous up the spire.

[2] P. hemphilli can be found in Caribbean waters, ranging from the western coast of Florida to the Bahamas.