defflogititl Surtog 0f \\t State tff JJfto garlt. 
PALAEONTOLOGY: 
Vol. V. Part IT. 
PLATES. 
CONTAINING FIGURES OF THE 
GASTEROPODA, PTEROPODA AND CEPHALOPODA 
OF THE 
UPPER HELDERBERG, HAMILTON, PORTAGE AND CHEMUNG GROUPS. 
By JAMES HALL, 
STATE GEOLOGIST 
ALBANY, N. Y.: 
CHARLES VAN BENTHUYSEN & SONS. 
1879. 
