BY II. H. SCOTT AND (.LIVE E. LORD. 85 



The basi-occipital has coalesced with the basi- 

 sphenoid, their sutures being obliterated, as are those of 

 tho palato-ptervgoids. The maxillo-palatine suture crosses 

 the palate at the interval betiween the third and fourth 

 molars — touches the aveolar ridge at about the same point, 

 zig-zags along tin' base of the last molar, turning outwards 

 and downwards to be lost in the overlap of the maxillo- 

 pterygoid plates. If a set of bristles are placed in the 

 nine main foramina of the base of the skull, a similar 

 set in the skulls of the two Wombats, that now 

 in South Australia and Tasmania, it will be si en that 

 with leanings- now to one, and now to the other, the fora- 

 mina of the Giant Nototherium are all depicted in the 

 two cz - ania named. Tin- anterior condyloid is nearer to 

 the Tasmanian skull; the fissura Lacera is partly indi- 

 vidual, owing to the enormous <l v lopmi at in the Noto- 

 > of tli.- par-occipital, and the rest alternate in like- 

 ness from one to the other; hut tie 1 general approximation 

 to the Wombat is exceedingly close all through. 



Owing to mutilations in tin- palate of Nototherium 



lasmanicum, it is not easy to conduct a comparison with 



the skull now under review, hut it appears bo have mani- 



tnany differences a- the two Wombats' skulls do 



in their departures from a common type. 



The following table of measurements will give an 

 accural idea of the size of tie.- skull: — 



Total length between vertical rods mm. 



Greatest width 380 ,, 



Height resting upon pre-massiter 



processes (without mandibh ) ... 260 



Greatest width of forehead 1 7~> ., 



,, ,, .. nasals 175 ,, 



From occiput-- in a central line — 



to the tips of tin nasals 380 ,, 



Width of occiput 340 ,, 



MANDIBLE. 



Having stated that the mandible from the Boyd's 

 Colle; tctly similar to that of our male animal 



from Smithton, a g< neraJ knowledge of these jaws will 

 be widely available — since easts are always obtainable 

 from the British Museum, and most Museums hold copies. 

 These jaws are incomplete, anterior to the diastema, and 

 the ascending coronoid processes are missing. Some of 

 these imperfections are now made good by our photograph 

 of the Tasmanian mandible, and these, together with the 



(5) Brit. Mus. Cat. Foss. Mamm. f. 32.050. 



