xii 



LIST OF ILLUSTRATIONS. 



Turrilites costatus, 320 



tuberculatus, 320 



undulatus, 319 



U 

 Uraster rubens, 133 



Ventriculites, 22, 23, 24 

 Vincularia, 217 



Voluta athleta, 276 

 Lamberti, 291 



W 



Woodocrinus macrodactylus, 121 

 Worm- tracks, 161 



Zaphrentis, 65 



