Leptopoma niahensis (Godwin-Austen, xxxx)  

Godwin-Austen (1891) original descriptions on Helix (Geotrochus) niahensis – “Shell dextral, pyramidal, tbin texture, base flat; sculpture, spiral lirae, fine, regular, not of continuous thickness, crossed by lines of growth; colour white, with some fine marbling in a greyer colour within the aperture, porcellaneous white; spire high, pyramidal, sides slightly concave; apex acuminate; suture fine, linear; whorls 7, very flat; aperture ovate, wide and ample, oblique; peristome sharp, coming to an angulate form at the outer keeled margin, expanded and thickened below towards the columellar side.”