1.It is an example of phylum chordata and sub-phylum vertebra- ta and class reptilia.
3.Diennual shell, ovoid with well developed homy scales.
4.Limbs modified into paddles.
1.It Is an example of phy-lum chordata and sub-phylum vertebrata and class reptilia.
2.Fresh water and terres-trial form.
3.The shell has no horny scales but a covering of soft skin.
4.Limbs bears digits and claws adapted for walk-ing on land.