rad 
PHASCOLOTHERIUM, 65 
The general form and proportions of the coronoid pro- 
cess (fig. 20, b,) resemble those in the zoophagous Marsu- 
pials; but in the depth and form of the entering notch, 
between this process and the condyle, it corresponds most 
closely with the Thylacinus. 
It is, indeed, a most interesting fact, that this rare and 
solitary genus, represented by a single species (the Hyena of 
the Tasmanian colonists), whose term of existence seems fast 
waning to its close, should afford the only example of a form 
and backward extension of the coronoid process, and a corre- 
sponding deep emargination above the condyle, which would 
else exclusively characterize the ancient Phascolotherium. 
The base of the inwardly-bent angle of the lower jaw 
progressively increases in Didelphys, Dasyurus, and Thyla- 
cinus; and judging from the fractured surface of the cor- 
responding part in the fossil, it also resembles most nearly, 
in this respect, the Thylacinus. 
The condyle of the jaw is nearer the plane of the in- 
ferior margin of the ramus in the Thylacine than in the 
Dasyures or Opossums; and, consequently, when the 
inflected angle is broken off, the curve of the line continued 
from the condyle along the lower margin of the jaw in the 
Thylacine is least; in this particular again the Phascolo- 
there resembles the Thylacine. In the position of the 
dental foramen, the Phascolothere, like the Amphithere, 
differs from all the zoophagous Marsupials already cited, 
and also from the placental Mere; but in the Potoroo 
(Hypsiprymnus), 2 marsupial Herbivore, the orifice of the 
dental canal is situated, as in the Stonesfield Marsupials, 
very near the vertical line, dropped from the last molar tooth. 
A portion of the inner wall of the jaw, near its anterior 
margin, in the Phascolothere, has been broken off, so that 
the form of the symphysis cannot be precisely determined ; 
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