from The Century Dictionary and Cyclopedia
- n. An amphirhine animal, or one which breathes through two nostrils; one of the Amphirhina (which see), or any vertebrate above the Monorhina.
Sorry, no etymologies found.
It is a _double-breather_, showing evolution in process.
Australian mudfish or double-breather (Dipnoan), which may be a long way over a yard in length, is a direct and little-changed descendant of an ancient extinct fish, Ceratodus, which lived in Mesozoic times, as far back as the Jurassic, which probably means over five millions of years ago.