Opisthostoma perakensis Godwin-Austen, 1879

Morphology: 

By Godwin-Austen (1879)

"shell dextral, much depressed, ovate, the last whorl reflected half a turn back and rising to a level with the penultimate suture; colour ruddy brown; sculpture fine ribbing, wide apart and regular to the apex. Spire depressed, sides parallel, apex flat, suture deep. whorls 4, sides convex; penultimate and antepenultimate equal, the last reversed. Aperture circular, vertical; peristome double, inner lip circular, continuous; the outer lip angular below. size, alt. 0.30, major diam. 0.33 in."

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith