LIST OF ILLUSTRATIOISrS W THE TEXT. 



PAGE 



Lower molars of Mus catreus, n.sp., Bhagomys orthodon, and Cricetomys 5 



Oil accumulation due to terrace structure 



Oil accumulation, undenuded folded beds 



Oil accumulation caused by a salt dome 



Oil accumulation due to igneous doming 



Oil accumulation in sand dammed by dykes . 



Oil accumulation in porous beds dammed by fault 



Oilfield at Bushterrari 



Oil derived from upfolded saliferous Miocene 



Oil accumulation in porous strata . . 



Oil accumulation in strata tipping unconformably from old shore-line 



Oil in outcropping beds sealed in by bitumen . 



Oil accumulation in horizontal sand lenticle . 



Oil in inclined discontinuous porous bed 



Diagra.mmatic longitudinal section of picrite-teschenite sill, Lugar 



Sketch-map of the Jiblong and Bors Elvers, Africa 



Portion of molar tooth of elephant, Khartum 



Map of Bannus Lough, Donegal 



Map of Lough Avehy, Donegal 



View looking south-east from Upper Donegal 



Map of district west of Pettigo, Donegal 



View of drumlins looking west from Trumman 



View looking W.S.W. from near Ballintra 



Contour map of drumlins west of Ballintra 



Map of S.W. Trinidad 



Gneiss showing the inclusion of quartz in orthoclase, etc. 

 Gneiss showing biotite myrmekitically intergrown with quartz 

 Piece of fossil rib, partially sawn across at ends 

 Base of shed antler of red deer, antlers partly sawn off 

 Piece of red ochre cut into shape for marking lines 



19 



20 



21 



22 



22 



22 



23 



23 



54 



54 



55 



55 



56 



75 



107 



111 



117 



118 



154 



155 



156 



157 



158 



160 



216 



217 



218 



219 



220 



