Geological Survey of the State of New York. PALEONTOLOGY: VOL. V. PART II. TEXT. CONTAINING DESCRIPTIONS 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. ORD LIBRARY Eat |