PEOFESSOE OWEN ON THE FOSSIL MAMMALS OF AUSTEALIA. 



573 



from this number the amount of osseine present (0-295 per cent.), there remain 5"479 per cent., the proportion 

 of water present in the bone. 



" It may be mentioned that the bone contained a considerable quantity of vivianite, which gave to portions of 

 its interior a dull blue colour. 



"Analysis of Substances JiUing cavity of tooth 0/ Diprotodon [Pulp-cavity of lower incisor, 



Plate XLII. fig. 5, i.—R. 0.]. 



" The nitrogen in a portion of the above, which had been dried for many hours at 100°, was determined by 

 the usual method. 



" 0-9814 gramme of substance, heated with soda-lime, gave 0-0071 gra mm e platinum, which corresponds 

 with 0-001 gramme nitrogen. 



" Regarding this nitrogen as present in the form of osseine, and employing the number obtained by Fe£my 

 (17-5 per cent.) in his analysis of the gelatine of beef-bone as correctly representing the percentage of nitrogen 

 in osseine, we find the substance from this fossil tooth to contain 0-58 per cent, of osseine. 



" "When heated in a tube it became slightly darker in colour, and emitted a faint empyreumatic odour. 

 " It was found to be composed of 



Much carbonate lime, 



Some phosphate lime, 



Much silica, iron oxide, &c.. 



Some water not removable at 100°, 



The smaU portion of organic matter already mentioned. 



" I am, dear Sir, 



"Your obedient Servant, 



" To Professor Stoet-Maskeltne, " Waiter Flight." 



Keeper of the Mineral Department, British Museum." 



Table of Admeasueements. 

 Skull. 



Feet. Inches. Lines. 





3 



0 



0 





1 



6 



0 





1 



10 



0 





1 



0 



0 





1 



1 



0 



From lower border of foramen magnum to middle of superoccipital ridge . . 



0 



9 



9 



Breadth of cranium at middle of temporal fossa and at the level of the 











0 



6 



6 





0 



8 



0 





0 



10 



0 





0 



4 



0 



Length of mandible from back of condyle to outlet of incisive sockets .... 



2 



0 



0 





1 



1 



0 





0 



7 



0 





0 



5 



0 





0 



6 



0 





0 



3 



6 





0 



4 



6 





0 



8 



6 





0 



9 



0 



