PHASCOLONUS. _ 265 
FAMILY PHASCOLOMYID: (supra, p. 122). 
GENUS PHASCOLOMYS (sufra, p. 124). 
In addition to remains of the two existing forms, several ex- 
tinct species of Wombat have been described from the super- 
ficial deposits of Australia, but since these do not present any 
features of special interest, they will not be further mentioned 
here. 
GENUS PHASCOLONUS. 
Phascolonus, Owen, Phil. Trans., 1872, p. 257. 
PHASCOLONUS GIGAS. 
LPhascolomys gigas, Owen, Encyclopedia Britannica, 8th ed., 
Tol. XVil., ps £75 (1850). 
Phascolonus gigas, Owen, Phil. Trans., 1872, p. 257; Lydekker, 
Cat. Foss. Mamm. Brit. Mus., pt. v., p. 157 (1887). 
This species was far larger than any existing Wombat, and 
may be compared in size toa Tapir. Itis at present doubtful 
if it be really entitled to generic separation from Phascolomys, 
the writer having once urged the necessity for such separation 
in the belief that the teeth mentioned under the next heading 
belonged to it. 
Dr. Stirling states that several skeletons, probably belonging 
to this species, which he compares in size to a Bullock, have 
been disinterred in the salt-deposit in South Australia, men- 
tioned under the head of Difrotodon. It is to be hoped that 
these specimens will definitely decide the question as to the 
nature of the upper incisors ; the lower ones are very similar 
