 Snake scales occur in variety of shapes.They may be cycloid as in family Typhlopidae, long and pointed with pointed tips, as in the case of the Green Vine Snake "Ahaetulla nasuta", broad and leaf-like, as in the case of green pit vipers "Trimeresurus" spp or as broad as they are long, for example, as in Rat snake "Ptyas mucosus".In some cases, scales may be keeled weakly or strongly as in the case of the Buff-striped keelback "Amphiesma stolatum".