CHAPTER V
THE SUBCLASS PROTOTHERIA OR ORNITHODELPHIA 117
General characters, 117. _Family_ ORNITHORHYNCHIDÆ, 119; _Ornithorhynchus_, 119. _Family_ ECHIDNIDÆ, 124; _Echidna_, 125; _Proechidna_, 126; Fossil species, 127.
Foods and Their Adulteration: Origin, Manufacture, and Composition of Food Products; Description of Common Adulterations, Food Standards, and National Food Laws and Regulations
THE SUBCLASS PROTOTHERIA OR ORNITHODELPHIA 117
General characters, 117. _Family_ ORNITHORHYNCHIDÆ, 119; _Ornithorhynchus_, 119. _Family_ ECHIDNIDÆ, 124; _Echidna_, 125; _Proechidna_, 126; Fossil species, 127.