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"Chondrocranium of Frog (Rana esculenta). y, girdle-bone or os en ceinture; EO, exoccipital; PrO, proötic; QJ, quadratojugal." -Whitney, 1911

Frog Chondrocranium

"Chondrocranium of Frog (Rana esculenta). y, girdle-bone or os en ceinture; EO, exoccipital; PrO, proötic;…

"The edible frog (Rana esculenta)." -Thomson, 1916

Edible Frog

"The edible frog (Rana esculenta)." -Thomson, 1916