The Third Part exemplifies the bearing of Embryology upon these general questions, while it contains the fullest illustration of the embryonic growth of the Testudinata.
3
We see that the other two parts are devoted to the description and delineation of a single order of Reptilia,-theTestudinata, or "Turtles."
4
Tortoises (Testudinata, or Chelonians) belong to a very numerous order of reptiles, the usual form of which is too well known to require description.
5
The two first cases devoted to Testudinata (18, 19) contain the American, Indian, and African varieties of the land tortoise.