PLATE XI 

 UPPER PALAEOZOIC FOSSILS 



FIG. i. Calceola sandalina. Middle Devonian, Gerolstein, Eifel. 



FIG. 2. Lithostrotion basaltiforme. Carboniferous Limestone. Poyll 



. .. .'. Vaish, Isle of Man. 



FIG. 3. Orbitremites ellipticus. Carboniferous Limestone, Clitheroe. 

 FIG. 4. Platycrinus gigas. Carboniferous Limestone, Clitheroe. 



FIG. 5. Melonechinus keepingi. jCarboniferous Limestone. (Modified 

 from Jackson. ) 



FIG. 6. Productus scmireticulatus martini. Carboniferous Limestone, 

 Castleton, Derbyshire. 



FIG. 7. Pugnax acuminatus. Carboniferous Limestone, Dovedale., 



Fie;. 8. Dielasma hastata. Carboniferous Limestone, Castleton. 



FIG. 9. Spirifer striatus. Carboniferous Limestone. (After Davidson.) 



8 



