, I)6tii Congress \ 

 JTn \Je rt • .id Sesgion I 



IKU'SK OF KKPRESENTATIVKS 



-Zj^c 



( DOCU.MB 



( No. ss 



BNT 



<S1 



DEPARTMENT OF THE INTERIOR 



Albert B. Fall, Secretary 



UNITED STATES GEOLOGICAL SURVEY 



George Otis Smith, Director 



Professional Paper 124 



THE INORGANIC (CONSTITUENTS OF 

 MARINE INVERTEBRATES ' 



SECOND EDITION, REVISED AND ENLARGED 



BY 

 FRANK WIGGLESWORTII CLARKE 



AND 



WALTER CALHOUN WHEELER 



t 2.^-9 



■?<: ^. 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 

 1922 



