(pH 
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(iwlogM Siirten of tb^ State cf geto gorlt. 
PALAEONTOLOGY: 
VOL. VII. 
TEIXIT ^3SriD IP L .A. T E! S . 
' CONTAINING DESCRIPTIONS OF THE 
TRILOBITES AND OTHER CRUSTACEA 
OF THE 
ORISKANY, UPPER IlELDERBERG, HAMILTON, PORTAGE, CHEMUNG AND CATSKILL GROUPS. 
15 V 
JAMES HALL, 
STATE GEOLOGIST AND PALiEONTOLOGIST. 
ASSISTED 131' 
.]OHN M. CLARKE. 
ALBANY, N. Y.: 
CHARLES VAN BENTHUYSEN & SONS. 
1888. 
