LIST OF ILLUSTRATIOIsrS m THE TEXT. 



stems with rhizomes attached of Eqidsetites columnaris (Brong.) 

 Diagram illustrating the Glacial and Interglacial Periods 

 Generalized section, spilite lavas, northern type 

 Generalized section, spilite lavas, southern type 

 Genealogical development of the Monticuliporoids 

 Diagram of Creechbarrow Hill . . . . 



Eolith from Plateau Gravel, Ightham 



Formation of columella in Lopliophyllum and Cyathaxonia 



Map showing position of chalk-pebbles found in English Channel 



Key-map to Geological Survey Map, Cornwall 



Section across Cornwall ...... 



Sketch-map of West Leicestershire .... 



Veri'uca from Norwich Chalk ..... 



PorosplicBra globularis, 'PhilliT^s . . . 

 Lower jaw, Pachygenelus monus, Watson, gen. et sp. nov. 

 Molars, P. monus, Watson, gen. et sp. nov. . . 

 The Yangtze and Salween Elvers ..... 



An oasis, Mekong Eiver Valley ... 



Lake in rock-basin on Mekong-Yangtze Divide 



End of femur of Elopteryx nopcsai, Andrews, gen. et sp. nov, 



End of tibio-tarsus of E. nopcsai, Andrews, gen. et sp. nov. 



Diagram of ambulacral plates of Lanieria lanieri, Duncan 



Forearm of Lystrosaurus sp. . 



Upper ends of radius and ulna of Lystrosaurus sp. 



Lower ends of tibia and fibula of Lystrosaurus sp. . 



Lower jaw of lynx, Felis lynx, Gop Cave, North Wales 



Upper maxUla of lynx, Cales Dale Cave, Derbyshire 



Dorsal aspect of Euryioterus Fischeri 



Ventral aspect of E. Fischeri 



Periscliodomus biserialis (maxillae) 



P. biserialis (epiphysis) 



Plates of Helminthocliiton ceguivoca, Eobson, sp. nov. 



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