Fauna of the Morrow Group 
247 
PISCES 
COCHLIODONTID^ 
Genus DELTODUS Agassiz 
Deltodus? sp. 
A number of fragments of fish teeth and scales have been 
observed in the Morrow formations but only two specimens 
sufficiently complete to give any clue to the type of fishes that 
lived in the Morrow seas have been recovered. One of these 
is provisionally placed in the genus Deltodus as it is a much 
worn fragment too incomplete for accurate determination. It 
seems to correspond more closely to the forms referred to that 
genus than to any others. 
Horizon and locality. Morrow formation: near Ft. Gibson, 
Oklahoma (Station 303). 
PETALODONTID^ 
Genus PETALODUS Owen 
Petalodus sp. 
A nearly complete tooth is referable to the genus Petalodus. 
It has the same general characteristics as P. destructor, but is 
considerably smaller than the teeth ordinarily placed in that 
species. 
Horizon and locality. Hale formation: East Mountain, Fay- 
etteville, Arkansas (Station 136). 
REGISTER OF LOCALITIES. 
134. Fayetteville quadrangle: Brentwood limestone lentil. One and a 
half miles northeast of Fayetteville, Ark. 
Outcrop near road. Center, sec. 10, T. 16 N., R, 30 W. 
135. Fayetteville quadrangle: Brentwood limestone lentil. Three and a 
half miles northeast of Fayetteville, Ark. 
Abandoned quarry. S. %, sec. 2, T. 16 N., R. 30 W. 
136. Fayetteville quadrangle: limestone lense in Hale formation. West- 
ern slope of East Mountain, Fayetteville, Ark. 
Outcrop near Klyce Spring. NW. sec. 15, T. 16 N., R. 30 W. 
137. Fayetteville quadrangle: limestone lense in Hale formation. South- 
western slope of East Mountain, Fayetteville, Ark. 
Outcrop near Confederate cemetery. SW. 14, sec. 15, T. 16 N., 
R. 30 W. 
