SPECIAL PUBLICATIONS OF THE ACADEMY OF NATURAL 

 SCIENCES OF PHILADELPHIA 



No. I. — The Mineralogy of Pennsylvania, by Samuel Gordon. 



No. 2. — Crystallographic Tables for the Determination of Minerals, by V. 



GoLDSCHMiDT and Samuel Gordon, (Out of print.) 

 No. 3. — Gabb's California Cretaceous and Tertiary Lamellibranchs, by 



Ralph B. Stewart. 

 No. 4. — New Names Introduced by H. A. Pilsbry in the Mollusca and 



Crustacea, by William J. Clench and Ruth D. Turner. 



Publications Committee: 



H. Radclyffe Roberts, Chairman 

 C. Willard Hart, Jr., Editor 

 Ruth Patrick 

 James A. G. Rehn 

 James Bond 

 James Bohlke 



Printed in the United States of America 

 WICKERSHAM PRINTING COMPANY 



