In this article we will discuss about the structure of different vertebrae. I. Procoelous: A. Bufo sp. (Toad), Rana sp. (Frog): 1. Hypapophysis and chevron bone absent. 2. Neural spine: A median elevation (Bufo); backwardly directed (Rana). 3. Atlas: Prezygapophyses absent. 4. Typical vertebra: Postzygapophysis present. B. Calotes sp. (Lizard): 1. Presence of hypapophysis in […]