Shell small for the genus, 17-33 mm in length, solid, surface smooth, rather dull. Shape fusiform, slender, siphonal canal short. Whorls slightly angulate above midwhorl, with weak subsutural concavity. Colour white to dirty white, with pale brown axial pattern between axial ribs. Rarely completely white. Protoconch white to dirty white, smooth, glossy, consisting of 1.25-1.50 whorls. Diameter 1.5 - 2.1 mm. Teleoconch consisting of 5 or 6 whorls. First teleoconch whorl with 7-10 hardly visible, equally spaced spiral grooves, 8-10 on second whorl. Body whorl with numerous, hardly visible, fine spiral lines. First teleoconch whorl with 10-12 narrow axial ribs traversing from suture to suture, 8-10 on second whorl. Body whorl with 7-9 short axial ribs, running from just below suture to half way body whorl. Aperture ovate to lens-shaped, outer lip convex. Columellar callus thin, smooth and glossy, without columellar fold. Both columellar teeth small but sharp. Inner side of outer lip with 14-16 spiral cords (in some specimens absent) producing a knob near outer lip (in some specimens only visible on abapical part). Operculum corneous, thin, pale brown, shape corresponding to aperture, with terminal nucleus. Radula: central tooth with stretched upper part and 3 elongate cusps, connection between tooth and base of cusps narrow. Lateral teeth with 3 cusps, the outermost largest, inner and middle cusp of equal size.

E. scepta differs from all other known recent Euthria and Siphonofusus species in the small adult size and the axial sculpture with brown pattern between.

Distribution and habitat. E. scepta is known from off Ile des Pins, southern New Caledonia, and is probably endemic to a small area there. Bathymetric range alive in 400-530 m, empty shells in 380-500 m.