CONTENTS 



Part XV 



Systematic : — Page 



Nomenclature xi 



Descriptions : — Plate 



109. A. clevelandicus CIX 



no. A. elegans CX 



in. A. ovatus CXI a, b, c 



Supplementary Plates : — . 



Bifericeras bifcrum CXXIV 



A. sedgwickii . . , CXXV 



Beaniceras senile . CXXVI 



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