F’. V. Greene on the composition of remains of Mammalia. 19 
#e Mg Ca CaFl Ba Na K Si Sf .6 .H Org. Mat 
1777 0-348 49837 0-716 0°359 1-134 0-317 0135 1-067 34°148 4-088 2048 5:62 101-656 
with a trace of manganese and chlorine: which may be con- 
sidered as 
2Fe.0,,PO; ~ Real S€a0, Si04....i.. 4+ +... 0882 
3Mg0,PO,;  . . O-770 aut, eae 
3Ca0, PO; . 69685 CaO el Se 
2Na0, POs ‘ : 1416 CaFl ‘ ; ; 0-716 
BaO, SO3 . 0647 HO Hale re 
NaO,SO, 2 fe 1-083 Org. Mat. - 5682 
KO, SO ‘ é 0°587 —- 
101°656 
2. Tooth of Titanotherium. 
a. Enamel. 
Fibrous, with uneven fracture. Very tough. Hardness 4:7. 
Sp. Gr. 4:7 (at 20° C.) Color bluish gray. “Opaque. Lustre— 
surface stain fibres pearly. Contains 
Mg Ga CaFl Na kK &§i 8 é Hf Org. Mat. 
0219 51-872 et 1288 0°239 0611 1:°011 89348 3°165 0626 2538=—101-016 
with traces of oxyds of manganese and iron: which may be con- 
sidered as 
3MgO, PO; ; a 0403 8Ca0, Si0g * . TZ 
8CaO, POs . 883°835 CaFl - 0.099 
2NaO, POs 8 S874 1-418 CaO NE ' sages) 1-284 
NaO, SO3 1437 HO ‘ ; ; 0626 
0,80, ae Org. Mat. re See 
CaO, COs ec iar aapaiy 
101-016 
3. Tooth of Titanotherium. 
4. Dentine. 
Compact. Fracture uneven, somewhat subconchoidal. Hard- 
ness 2-5, Sp. Gr. 2°935 (at 20° ©) Lustre dull. Color white, 
in Pe ig (a. CaFl Na kK Si S F OC GQ H Org. Mat 
traces 0°53 49°82 2:90 0°75 0-23 0°79 151 8610 2°83 trace 2:10 26610022 
with traces of oxyds of manganese and iron: which may be con- 
sidered as 
$Mg0, PO, «© i. 19098 CaO, CO2 .gilesiose 
3CaO, POs c tecieie oe CaFl aie ee 
CaO, SO, ee OD CaO Pe EE ee 
Na, SO, SE Obl at HO ee 
KO, 80, 2 ie ee Org. Mat. dw i ceeaalll 
3020,810g. | ss 288 — 
4. Tibia of Archeotherium. 
Compact ; fracture uneven, somewhat splintery. Hardness 4, 
Sp. Gr. 2:826 (at 20°C.) Lustre pearly. Opaque. Color pink- 
