52 SPECIES OF EXOGYRA FROM THE EASTERN GtTLF REGION AND THE CAROLINAS. 



marine beds) of eastern Alabama and Georgia. The lower limits of the range of typical speci- 

 mens in the eastern Gulf region is shown in Plates IX and X by the red line 2. 



In the Carolinas the species occurs throughout the Peedee sand. 



In New Jersey the species is present in the Navesink marl and the Redbank sand, both 

 formations of the Monmouth group. 



. In Arkansas the species ranges through the Marlbrook marl, the Nacatoch sand, and the 

 Arkadelphia clay. 



In Texas the species is a common fossil hi the Navarro formation and its equivalent the 

 " Webberville " formation. 



In Mexico the species occurs in the Cardenas division of the so-called lower Senonian. 



Localities. — In the eastern Gulf region the species has been collected from 81 localities 

 distributed along a belt 10 to 20 miles wide, extending from Macon County, Ga., through 

 Alabama and Mississippi, to the Tennessee State line. The trend of this belt may be seen by 

 referring to the map, Plate IX; the area embraced by the belt is included between the red 

 line 2 and the line marking the southern and western boundary of the Cretaceous area. De- 

 tailed descriptions of all the localities accompany the tables, pages 24-25. The following typical 

 localities may be mentioned in detail: 



U. S. Geol. Survey colls. 1S6, 389, 854, 64Q0. — Chattahoochee River at Eufaula, Ala. Ripley formation, Exogyra 

 costata zone. 



U. S. Geol. Survey coll. 039S. — Chattahoochee River, opposite the mouth of Burstahatchee Creek, 5J- miles (by 

 the river) above Eufaula, Ala. Ripley formation, near base of Exogyra costata zone. 



U. S. Geol. Survey colls. 5375, G41Sa-e, e-h, j. — Johnsons Hill, 4 miles north of Lumpkin, Stewart County, Ga. 

 Ripley formation, Exogyra costata zone. 



U. S. Geol. Survey colls. 0413, 0414. — Cuts of Seaboard Air Line Railway north of Renfroes, Stewart County, Ga. 

 Ripley formation, Exogyra costata zone. 



U. S, Geol. Survey colls. <i430, 6789. — Alabama River, Old Canton Landing, Wilcox County, Ala. Tongue of 

 Selma chalk at top of Cretaceous. 



U. S. Geol. Survey colls. 292, 0438. — Tombigbee River. Moscow Landing, about 14 miles below Demopolis, Sum- 

 ter County, Ala. Top of Selma chalk. 



U. S. Geol. Survey cull. 6804.— Livingston-Epes road, 4} miles northeast of Livingston, Sumter County. Ala. 

 Selma chalk, Exogyra costata /.one. 



U. S. Geol. Survey coll. 0|si)6, if, e,f. — Six miles north of Scooba on Wahalak-Binnsville road, westward -facing 

 slope of Wahalak Creek vallej . Kemper County, Miss. Near top of Selma chalk. 



U. S. Geol. Survey coll. 6479a-c. — Maeon-Shuqualak road, Smilessouih of Macon, northward-facing slope of 

 Running Water Creek, Noxubee County, Miss. Near top of Selma chalk. 



U. S. Geol. Survey coll. 6476. — Louisville road, 2 miles a little south of west, of Macon, Noxubee County, Miss. 

 Selma chalk. E 



U.S. Geol. Survey colls. 3186, 6843, 6844.— Gullies on grounds of Agricultural and Mechanical College at Stark- 

 ville, Oktibbeha County, Miss. Top of Selma chalk. 



C. S. Geol. Survey coll. 6863.— Six miles west of Tupelo, Miss., in gullies in field on westward-facing slope just 

 north of Tupelo-Pontotoc road. Toward base of Exogyra costata zone. 



IT. s. Geol. Survey colls. 75. 540, 707, 6464.— Owl Creek, 3 miles northeast of Ripley, in Tippah County, Miss. 

 Top of Ripley formation at type locality. 



U. S. G.-ol. Survey coll. 6459.— "Bald Knob " on Joseph Reynolds place, 3 miles west of Corinth, Miss. Toward 

 base of Exogyra costata zone. 



The species has been obtained from 2S localities in the Carolinas. Several of the more 

 notable localities are the following: 



l'. S. Geol. Survey coll. 4153.— Content n -a I reek. 1J miles above Grifton, Pitt County, N. C. Peedee sand. 



U. S. Geol. Survey coll. 4131.— Northeast Cape Fear River, right bank, 67* miles above Wilmington, in Duplin 

 County, X. C. Peedee sand. 



U. S. Geol. Survey cell. H33.— -Johnsons Cove, Northeast Cape Fear River, right bank, til J miles above Wilming- 

 ton, in Duplin County, X. C. Peedee sand. 



V. S. Geol. Survey coll. 3356 Robinsons Landing, Cape Fear River, right bank, 50 miles above Wilmington, 

 in Bladen County. X. C. Peedee sand. 



U, S. Geol. Survey coll. 4154.— Daniels Landing. Cape Fear River, right bank, 40 miles above Wilmington, 

 in Bladen County. X. C, Peedee sand. 



I". S. Geol. Survey coll. 3449.— Black Rock Landing, Cape Fear River,right bank, 37 miles above Wilmington, 

 in Bladen County, X. C. Peedee sand. 



