Shell very small and pupiform, strongly constricted at base, with a prominent rather large protoconch. Protoconch conical of 5.5 convex smooth whorls, forming by itself about 1/3 of the total height of the shell, with narrow and rounded apex, its last whorl of large diameter compared with teleoconch, its lower limit along an oblique line marked by change of sculpture and colour; the specimen photographed under SEM shows a worn surface. Teleoconch of 4 whorls with 3 spiral cords per whorl, crossed at right angles by slightly weaker axial ribs, with a rounded bead at each intersection; 20 beads per whorl. A fourth weaker and more finely beaded cord emerging from suture at base of last whorl. Aperture oval. Colour dark cream, protoconch pale brown.
Size: holotype height 1.8 mm., maximum width 0.6 mm; height of protoconch 0.42 mm; width of protoconch at base 0.35 mm.

This species has the same shape as Horologica macrocephala (Laseron, 1956), but differs from it in the 3 spiral cords instead of 2 on the teleoconch whorls, its weaker, more numerous and more close-set beads, and its smaller size. It differs from Joculator minima Laseron, 1956 in its smaller size (1.8 mm instead of 2.3mm), its proportionally larger protoconch (0.5 mm for the 2 species), its colour (cream instead of brown), and its subequal beaded cords, the beads of the upper cord being somewhat larger on J. minima.

Réunion: Found dead in hand-dredged sand at 10-20 m, off Saint-Gilles-Ies-Bains.