CONTENTS 



Part XVII 



Systematic : — Page 



Nomenclature xiii 



Descriptions : — Plate 



117. A. gregarius CXVII A, b 



118. A. dissimilis CXVIII A, b 



119. A. crassus , . . . CXIX 



Supplementary Plates : —  



Bifericeras parvum CXXVII 



Bifericeras nudicosta CXXVIII 



Beaniceras rotundum CXXIX 



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