Upper teeth are in 2 V-shaped series with blunt apices directed forward. A vomerine series of 9-12 teeth run parallel. Five to seven pterygoid teeth form an outward convex shape. The inner nares open in an oblique groove. There are three gill slits.
Body is stout, deeper than it is wide, having a slightly impressed mid-dorsal line.
The head is widest in front of the gills. Eyes are small and lidless. The mouth is small and crescent shaped. Nostrils are small round or oval. The toes are blunt and horny.