PLATE LY. 
. Inside view of mandibular ramus, Phascolomys vombatus. 
. Ditto ditto, Phascolomys platyrhinus. 
. Ditto ditto, Phascolomys latifrons. 
. Outside view of ascending branch of ditto, var. of Phascolomys latifrons. 
. Hind view of ascending branch of ditto, Phascolomys vombatus. 
PLATE LVI. 
. Under view of mandible, Phascolomys platyrhinus. 
Ditto ditto, Phascolomys vombatus. 
Ditto ditto, Phascolomys latifrons. 
. Right maxillary with front pier of zygoma, Phascolomys platyrhinus. 
. Ditto ditto, Phascolomys latifrons. 
PLATE LVII. 
. Upper view of mandible and mandibular dentition, Phascolomys platyrhinus. 
Ditto ditto, Phascolomys vombatus. 
. Ditto ditto, Phascolomys latifrons. 
. Section of lower incisor, Phascolomys platyrhinus. 
. Ditto ditto, Phascolomys latifrons. 
. First and second lower molars, right side, magn., Phascolomys platyrhinus, 
. First and second lower molars, ib., magn., Phascolomys latifrons. 
PROFESSOR OWEN ON THE SPECIES OF PHASCOLOMYS. 
showing the partial coat of enamel (the outer lobes of d 4 ought to be more 
angular). 
All the figures are of the natural size where not otherwise expressed. 
