Most snakes have a longitudinal groove on the underside of the head between large, paired chin shields and smaller gular scales. This is referred to as Mental groove.[1]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/7f/AB047_Scales_on_a_snakes_head.jpg/300px-AB047_Scales_on_a_snakes_head.jpg)
See also
editReferences
edit- ^ "Palaeos Vertebrates: Glossary M". Archived from the original on 2010-04-18. Retrieved 2010-03-15.