Reptiles and amphibia were at first united in one class because of their resemblance in external form.
"The Whence and the Whither of Man" by John Mason Tyler
The amphibia on the Peruvian coast are proportionally much better represented than the two foregoing classes.
"Travels in Peru, on the Coast, in the Sierra, Across the Cordilleras and the Andes, into the Primeval Forests" by J. J. von Tschudi
The gill amphibians are man's most ancient ancestors of the class amphibia.
"Was Man Created?" by Henry A. Mott
Fauna Sueciae Regni, Mammalia, Aves, Amphibia, Pisces, Insecta, Vermes; distributa per classes, ordines, genera et species.
"Lives of Eminent Zoologists, from Aristotle to Linnæus" by William MacGillivray
At this time, too, appeared the earliest Reptiles, chiefly of the Amphibia sub-class.
"Omphalos" by Philip Henry Gosse
The classes of the Vertebrata are Fishes, Amphibia, Reptiles, Birds and Mammals.
"Stories of the Universe: Animal Life" by B. Lindsay