f itologial Surtes of iljc ^tatf ai ftto Iflrk. 



M/ 



PALAEONTOLOGY; 



Vol. V. Part I. 



LAMELLIBRANCHIATA 



II. 



CONTAINING DESCRIPTIONS AND FIGURES 



OF THE 



DIMYA^RIA. 



OF THE 



UPPER HELDEKBERG, HAMILTON, PORTAGE AND CHEMUNG GROUPS. 



Br JAMES HALL, -a *). '^'7 



STATE OEOLOOIST. ,,^— f^Zf^O 



ALBANY, N. Y.: 

 CHAELES VAN BENTHUYSEN & SONS, 

 1885. 



