Pipa
a genus of Batrachian reptiles, closely allied to the common toad, but distinguished by the body being horizontally flattened, the head large and triangular, tongue wanting, tympanum concealed beneath the skin, the eyes small, placed near the margin of the upper jaw. The best known species is the Surinam toad, P. Surinamensis, which is considerably larger than the common toad. The pipa lays its eggs in the water, after which they are collected water, by the male, and placed on the back of the female, the skin enlarging in such a manner as to inclose the eggs in cells; here the development goes on till the young come forth as perfectly formed toads.