Amphibia

[ am-fib-ee-uh ]

/ æmˈfɪb i ə /

the class comprising the amphibians.

Origin of Amphibia

1600–10; < New Latin < Greek amphíbia (zôia) (animals) living a double life, neuter plural of amphíbios. See amphibious

These are extinct Amphibia with a greatly developed dermal exoskeleton, which is generally limited to the ventral surface.
The Vertebrate Skeleton|Sidney H. Reynolds
No bone of this animal shows the deep pitting and heavy ornamentation characteristic of many primitive Amphibia.
A New Order of Fishlike Amphibia From the Pennsylvanian of Kansas|Theodore H. Eaton
The difference in the development of the segmental duct in the two types (Amphibia and Elasmobranchii) is very important.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
In Amphibia the single late formed and radiately striated (Waldeyer) membrane would appear to be a zona radiata.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour

At first sight the differences between their development and that of Amphibia would appear to be very great.
The Works of Francis Maitland Balfour, Volume III (of 4)|Francis Maitland Balfour