DESCRIPTION OF THE PLATES. 



PLATE XLVI. 



Fig. 1. Side view of the skull of Phascolomys platyrliinus. 



Fig. 2. Back view of ditto ditto. 



Fig. 3. Rack view of ditto of Phascolomys vombatus. 



Fig. 4. Ditto ditto of Phascolomys latifrons. 



Fig. 5. Foramen magnum, var. of Phascolomys platyrliinus. 



Fig. G. Ditto and part of occiput, var. of Phascolomys vombatus. 



Fig. 7. Left half of ditto, and part of occiput of Phascolomys latifrons. 



PLATE XLVII. 



Fig. 1. Top view of skull of Phascolomys platyrliinus. 



Fig. 2. Fore end of cranium of Phascolomys platyrliinus. 



Fig. 3. Nasal bones, var. of Phascolomys vombatus. 



Fig. 4. Ditto, var. 2 of ditto. 



Fig. 5. Ditto of Phascolomys latifrons. 



PLATE XLVIII. 



Fig. 1. Basal view of skull of Phascolomys plat yrhinus. 



Fig. 2. Upper incisor, side view ; and 2', section, ditto. 



Fig. 3. First and second upper molars, magnified 2 diameters, ditto. 



Fig. 4. Palate, var. of Phascolomys vombatus. 



Fig. 5. Ditto, var of Phascolomys latifrons. 



PLATE XLIX. 



Fig. 1. Basal view of skull, Phascolomys latifrons. 



Fig. 2. Upper incisor, side view ; and 2', section c — e, ditto. 



Fig. 3. First and second upper molars, magnified 2 diameters. 



Fig. 4. Supratympanic cells and tympano-squamosal gomphosis, ditto. 



Fig. 5. Vertical longitudinal section of the skull, ditto. 



Fig. 6. SuDratympanic cells and tympano-squamosal suture, Phascolomys pi atyrhnus. 

 All the figures are of the natural size, save where otherwise expressed. 



For descriptions of Plates LII. to LVI. see pp. 336, 337. 



