Animal limaciform, subcylindrical, tapering anteriorly ; tentacles simple, mantle small, posterior, quite near the tail, covered with a small external shell ; no longitudinal furrows above the margin of the foot, and no caudal mucous pore ; no distinct locomotive disk ; respiratory orifice at the posterior right edge of the mantle under the peristome of the shell ; combined generative orifice behind and below the right superior tentacle. Shell external, rudimentary, imperforate, ear-shaped, with a subspiral, posterior nucleus.