li 
_ molars; but it is not improbable that the fossil and living 
forms pass imperceptibly one into the other, 
EXTINCT KANGAROOS. 255 
Distribution.— Australia. 
II. MACROPUS FERRAGUS. 
Pachysiagon ferragus, Owen, Extinct Mamm. Australia, p. 449 
(1879). 
Macropus ferragus, Lydekker, Cat. Foss.) Mamm. Brit. Mus., 
pt..v-, p: 230 (1887). 
An. imperfectly known species, allied to the preceding, but of 
somewhat larger size. 
Distribution Queensland and New South Wales. 
III. MACROPUS ALTUS. 
Phascolagus altus, Owen, Phil. Trans., 1874, p. 261. 
Macropus altus, Lydekker, Cat. Foss. Mamm. Brit. Mus., pt. 
V., P. 223:(1837). 
Characters.— This large species is nearly allied to the existing 
Macropus robustus, in which the upper molars have no longi- 
tudinal bridge between the anterior basa] ledge and the first 
transverse ridge ; the last premolar being small, and (as in JZ, 
giganteus) frequently shed in the adult. To JZ robustus the 
present species appears to bear a relation similar to that held 
by IL titan to M. giganteus. 
Distribution—New South Wales and Queensland. 
Iv. MACROPUS COOPERI. 
Osphranter cooperi, Owen, Phil. Trans., 1874, p. 261. 
Macropus coopert, Lydekker, Cat. Foss. Mamm. Brit. Mus., pt 
Wap: 224 (1887). 
