4&oIagieal ^urijtn at t\t BMt al $bto graft. 



PALEONTOLOGY: 



Vol. V. Part II. 



TEXT. 



CONTAINING DESCRIPTIONS OF THE 



GASTEROPODA, PTEROPODA AND CEPHALOPODA 



UPPER HELDERBERG, HAMILTON, PORTAGE AND CHEMUNG GROUPS. 



By JAMES HALL, 



a? 



8TATB GEOLOGIST. «Q *}. 



7* 



j*l?> 



ALBANY, N. Y. : 



CHARLES VAN BENTHUYSEN & SONS. 



1879. 



