Famelica monoceros is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
The length of the shell attains 4.6 mm.
The thin, ivory-white, high, narrow shell is drawn out, with fine spiral threads, a very oblique impressed suture, rounded whorls, and a contracted base produced into a longish snout.
Sculpture. Longitudinals—none but fine, somewhat unequal lines of growth. Spirals—with the exception of the sinus-area, the whole surface is covered by fine, rounded, unequal, and irregularly interrupted spiral threads with rather broader intervals. The colour is porcellaneous, ivory-white, glossy.
The spire is remarkably narrow, high, drawn out and conical. The apex is broken. There are five whorls remaining, but probably 8-9 in all, of very regular, but rather rapid increase, high, oblique, slightly tumid. The body whorl is rounded, with a conical, protracted, but very lop-sided base running out into a longish straight columella and triangular snout. The suture is very oblique and rather deeply impressed. The aperture is pear-shaped, scarcely pointed above, and protracted into a gradually narrowing siphonal canal below. The outer lip has a very regular curve in both its planes. The outer edge has a very high and prominent shoulder, whose upper side runs a long way parallel to the body whorl above it, having a very deep rather than narrow sinus, between which and the body whorl is no shelf whatever. The inner lip is on the narrow body scarcely perceptible as a glaze. On the long direct twisted columella it is a little thicker, but is very narrow : the end of the columella is cut off with a very long-drawn, oblique, slowly narrowing, sharp, twisted edge.
