﻿SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 127. PL. 268 



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DlNORTHIS, FASC1FERA, OLIGORH YNCH I A. OPIKINA. PLECTOCAMARA 



Ptychoglyptus, Sowerbyella, Stenocamara, Xenambonites, ZYGOSPIRA, 

 (see explanation of plates.) 



