g! 



a 



s5 



ID 



i o 



IO 



I 



'o 



SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 



BULLETIN 82 



A MONOGRAPH 

 OF THE EXISTING CRINOIDS 



BY 



AUSTIN HOBART CLARK 



VOLUME 1 

 THE COMATULIDS 



PART 4c. SUPERFAMILY TROPIOMETRIDA 



(the families Thalassometridae and Charitometridae) 



UNITED STATES 



GOVERNMENT PRINTING OFFICE 

 WASHINGTON : 1950 



For tale by the Superintendent of Documents, U. S. Government Printing Office 

 Washington 25. D. C. - Price 32.25 



