Laevicaulis natalensis, the brown leatherback slug, is a species of leatherleaf slug in the family Veronicellidae. This species is endemic to Southern Africa.
Laevicaulis natalensis contains the following subspecies:
The body is elongated-oblong, convex, and subcylindrical. It is coloured white-ashy and very finely punctate (covered with minute dots). The foot is transversely striate (marked with cross-wise lines), cut off squarely in front, and produced posteriorly into a pointed tail that is longer than the mantle. The tentacles are simple. The ocular tentacles are transversely striate. The labial tentacles (those near the mouth) are broader, blunt and twice as long as the ocular tentacles.
This species is endemic to Southern Africa.