Of the other Reptilia should be noted two species of lizard of a genus (Amblyrhynchus) confined to the Galapagos Islands.
The Batrachians differ essentially from all other orders of Reptilia.
In Reptilia it lies close to the trachea, and in the Chelonia and Crocodilia is paired.
In Birds the cellular tube formed round the notochord is far thicker than in the Reptilia.
The wrist bones in the Reptilia usually consist of two rows.
Owing to the development of the common iliac veins there is no renal portal system like that of the Reptilia and Amphibia.
The geologic volume in which these great formations are included corresponds to the Cuvierian one devoted to the Reptilia.
In the case of Reptilia the anterior two or three segmental tubes in the region of the testis probably have this function.
Natural history of cottonmouth moccasin, Agkistrodon piscivorus (Reptilia).
There are no vomerine, palatine, or pterygoid teeth, such as are met with in Amphibia and Reptilia.