The Amphibia, to which the sea is a barrier, are almost exclusively of Australian affinities.
This interesting animal, though a member of the Amphibia, is terrestrial and viviparous.
The Dipnoi show a distinct transition between fishes and amphibia.
Oxyuris, though chiefly parasitic in the Mammalia, occurs also in reptiles, Amphibia and one or two insects.
13), consisting of the sacrum (already described) and the pelvic arch, namely ilium, ischium and pubis, it follows that only birds and mammals possess a pelvis proper, whilst such is entirely absent in the Amphibia and in reptiles with the exception of some of the Dinosaurs.