PLATE XIII 

 MESOZOIC FOSSILS 



FIG. i. Isastraea explanata. Corallian, Shellingford, Berks. 

 FIG. 2. Apiocrinus parkinsoni. Bradford Clay, Bradford, Wilts. 

 FIG. 3. Paracidaris florigemma. Corallian, Stanford in the Vale. 



FIG. ^Phymosoma koenigi. Upper Chalk, near 'Kingsclere, Hants. 

 (The reconstruction of the apical system is hypothetical. ) 



FIG. 5. Nucleolites scutatus. Corallian, Marcham, Berks. 



FIG. 6. Micraster coranguinum. Upper Chalk, Ecchinswell, Hants. 



FIG. 7. Cyclothyris plicatilis. Upper Chalk, near Newbury. 



FIG. 8. " Terebratula " phillipsi. Bathonian, Button Bradstock, Dorset. 



FIG. 9. Zeilleria digona. Bradford Clay. Interior of dorsal valve. 

 ( After (Davidson.) 



FIG. 10. Spiriferina cf. tvalcotti. Lower Lias, Timsbury, Radstock. 



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