172 MARSUPIALIA 
and, as in Diprotodon, there appears to have been no tooth-change. 
The humerus probably referable to Nototherium is of a short and 
widely expanded type, with a large entepicondylar foramen, and 
coming nearer to that of the Wombat than to that of any other 
existing form. The Nototheriide may apparently be regarded as a 
distinct family connecting the Diprotodontide with the Phasco- 
lomyide and Phalangeride. 
Bibliography of Marsupialia.—G. R. Waterhouse, Nat. Hist. of the Mammalia, 
vol. i, ‘‘Marsupiata,” 1846 ; J. Gould, Mammals of Australia, 1863 ; R. Owen, 
article ‘‘Marsupialia,” in Cyclop. of Anatomy and Physiology, and various 
memoirs ‘‘On Extinct Mammals of Australia” in Philosophical Transactions ; 
W. H. Flower, ‘‘On the Development and Succession of the Teeth in the Mar- 
supialia,” Phil. Trans. 1867 ; O. Thomas, ‘‘On the Homologies and Succession 
of the Teeth in the Dasyuride,” Phil. Trans. 1887; and ‘‘Catalogue of Mar- 
supialia and Monotremata in the British Museum,” 1888. 
