'/ I- 



/ ^l' 



Contributions from the Geological Department 

 ^ . OF Columbia University 



Vol. XXI. No. I 



THE PHYLOGENY OF CERTAIN CERITHIID^ 



ELVIRA WOOD, A. M. 



Submitted in partial fullillmeat of the reciuireinents for the degree of Doctor of 

 Philosophy in the Faculty of Pure Science, Columbia University 



[Reprinted from the Annals of the New York Academy^ of Sciences, Vol. XX. 

 No. 1, Part I, pp. 1-92, PH. I-IX. Published 14 May, 1910] 



