<§eoIogital ^arUtg at tfee Statt of ^m farL 



PALEONTOLOGY: 



Vol. V. Part II. 



Fl-.A.'rSlS. 



CONTAIKIKG FIGIJUKS OF THE 



GASTEROPODA, PTEROPODA AND CEPHALOPODA 



UPPER HELDERBERG, HAMILTON, PORTAGE AND CHEMUNG GROUPS. 



By JAMES HALL, 



8TATB QBOLOGIST 



?^*i 



^'° 



ALBANY, N. Y. : 



CHARLES VAN BENTHUYSEN & SONS. 



1879. 



