XXV111 SYSTEMATIC LIST OF THE GENERA OF MAMMALIA. 
Cyclothurus, Gray . Page 191 
Myrmydon, Wagler. 
Didaetylis, F. Cuv . 
e. Ornithorhynchina . 
Platypus, Shaw . . . .191 
Ornithorhynchus, Blum . 
Dermipes, Wiegm. 
Echidna, Cuv. . . . .192 
Tachyglossus, Illig. 
Fam. 5. Bradypidce. 
Choloepus, Illiger . Page 192 
Bradypus, F . Cuv. 
Bradypus, Linn., Illig . 192, 193 
Tardigradus, Brisson. 
Arctopithecus, Gesner. 
Achseus, F. Cuv. 
