243 



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 filling cavity of tooth of Diprotodon [Pulp-cavity of lower incisor, 



Plate XXVII. fig. 5, it,— It. 0.]. 



" The nitrogen in a portion of the above, which had been dried for many hours at 1C0°, was determined by 

 the usual method. 



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

 with 0-001 gramme nitrogen. 



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

 (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 small portion of organic matter already mentioned. 



" I am, dear Sir, 



" Your obedient Servant, 



" To Professor Stoby-Maskeltxe, " Walter Flight." 



Keeper of the Mineral Department, British Museum." 



Table of Admeasurements. 

 Skull. 



Feet. Inches. Lines. 



Length from occipital condyle to fore end of premaxillary 3 



Breadth between outer sides of zygomata 1 6 



Depth to lower border of mandible at the orbit 1 10 



Depth to outlet of socket of upper ml, at the orbit 1 



Breadth of occiput 1 1 



From lower border of foramen magnum to middle of superoccipital ridge 9 9 

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



upper part of the zygomata 6 6 



Depth of facial part anterior to the orbit 8 



Depth of facial part at fore end of nasals 10 



Depth of zygoma at the lower end of the malomaxillary suture 4 



Length of mandible from back of condyle to outlet of incisive sockets .... 2 



Depth from summit of coracoid process 1 1 



Fore-and-aft breadth of ascending ramus 7 



Depth of horizontal ramus at the socket of m 1 5 



Length of symphysis 6 



Greatest depth of symphysis 3 6 



Length of upper incisive alveolar series 4 6 



Length of upper molar alveolar series 8 6 



Length of lower molar alveolar series 9 



