Publication date imprint 1968, appeared  1969.

 Abstract.  Nine species of goniatites occur in the upper part of the Cane Hill Member and the basal part of the
Prairie Grove Member of the Hale Formation.  These species comprise the earliest known cephalopod fauna from
the Pennsylvanian rocks of North America.  The Arkansas fossils occur in calcareous pebble conglomerate,
caleareous sandstone, and sandy limestone.  The stratigraphic interval in which all nine species occur and to which five
of them appear to be restricted constitutes the Reticuloceras tiro Zone.  This zone can be correlated approximately
with the lowest subdivision of the Lower Reticuloceras (R1a) Zone of northwestern Europe including the British Isles.
     The species described and figured in this paper are: Syngastrioceras globosum (Easton), Bisatoceras paynei Gordon,
Hudsonoceras moorei Quinn and Saunders, Cymoceras adonis n. sp., Reticuloceras tiro n. sp., Reticuloceras ? wainwrighti
Quinn, Reticuloceras ? sp., Branneroceras semiretia (McCaleb), and Stenopronorites quinni n. sp.