REPTILIA Description: Laying shelled eggs, and having skin covered in scales and/or scutes (bony external plate or scale, such as a turtles shell). Reptiles are cold-blooded. They are tetrapods (either having four limbs or being descended from four-limbed ancestors). Examples 1. American Alligator - Alligator Mississippiensis 2. Pacific pond turtle - Clemmys marmorata