1 6 Bulletin 4 130 



on Rocky Cedar creek the Midway limestone layers contain 

 Ostrea pidaskensis , Veneidcardia alticostata^ Venericardia plani- 

 costa, Crassatella gabbi, Pletirotonia anacona, Pseiidoliva unicari- 

 nata, F^dgicroficics. 



From this county, at a station numbered 2440 in the U. S. 

 Nat. Museum register and designated as four miles northeast 

 of Kemp, Mr. Stanton collected CiiaillcEa saffoT-dif , Cytherea, 

 Venericardia planicosta, Tiirj^tella niortoni and Natica alabami- 

 eiisis, (Ann'l Rep't Geol. Surv. Ark., vol. ii, 1892, p. 33). 



Arkansas. 



Hot Springs county. — Passing into Arkansas, the first known 

 fossiliferous Midway outcrop is to be found in the S. W. ^4^ of 

 S. 17, 4 S., 17 W. It contains among other less recognizable fos- 

 sils Cucullcea saffordif , Tiirritella viortoni and Venericardia sp. A 

 well at the site of old Rockport passed through Midway limestone. 



Saline cotuity. — In the northeast corner of the northwest quar- 

 ter of the northeast quarter of section 2, 3 S., 16 W., fossils are 

 imbedded in a light bluish, sandy and clayey limestone and in- 

 clude Ostrea pulaskensis, Cncnllcea saffordi, Yoldia eborea, Niicula, 

 Venericardia, Crassatella gabbi, Protocardia uicolletti vdiX., Corbula 

 snbcompressa, Turritella h^mierosaf , Volutilithes limopsisf . 



In the northwest quarter of the northeast quarter of section 

 36. 2 S., 16 W. , a very light yellowish sandy limestone furnished 

 Ostrea pulaskensis, Cytherea sp., Venericardia planicosta, Proto- 

 caj^dia sp., Crassatella gabbi. 



In the northeast quarter of the southeast quarter of section 

 18, 2 S., 15 W. , the following forms have been found: Ostrea 

 crenulimarginata , Yoldia eborea, Cytherea, Venericardia planicosta, 

 Turritella mnltilira? and a Volutilithes. 



In a bluish, argillaceous limestone matrix, in the southeast 

 quarter of the northwest quarter of section 15, i S., 14 W., 

 Ostrea crenulimarginata and pulaskensis have been found. 



From a highly ferruginous sandstone in the southwest quarter 

 of the southeast quarter of section 9, i S., 14 W. , fragments of 

 casts of Venericardia plajiicosta and Turritella niortoni have been 

 obtained. 



Pulaski county. — Perhaps the best or most fossiliferous Midway 

 exposure in Arkansas is one long ago described by Owen as on 

 Fourche creek near the mouth of Crooked Creek, only a few miles 

 southwest of Little Rock. This is in the northwest quarter of 

 the southwest quarter of section 8, i S. , 13 W. , not far from Olsen's 

 switch. Ulrich, Drake and Harris have collected fossils from 

 this vicinity, and they have been described by Dr. C. A. White 

 and G. D. Harris. The section here represented is as follows:^ 



