8 BULI.ETIN 4 1^3 



them to the Eocene series. We now are about to enter upon a 

 period when for some unknown reason geologists and paleontolo- 

 gists were prone to refer such deposits to the Cretaceous. 



Period of 1860-1883. 



Hilgard. — In Hilgard's Geological Report of i860* numer- 

 ous references are made to the Midway deposits in Tippah Co. 

 The limestone he refers to the Ripley Cretaceous, while the 

 clays he regards as L-ignitic or Lower Claiborne Eocene. 



Gabb. — In the same year Gabbf described specimens from 

 Hardeman Co., Tenn., sent him by Safford as Ripley fossils. 

 They were all from localities near Middleton. 



Safford. — In 1864 Dr. J. M. Safford published an article t 

 "On the Cretaceous and Superior Formations of Tennessee." 

 He gave therein an outline map and section showing the exact 

 localities whence he obtained the fossils sent to Gabb, and re- 

 garded them all as Cretaceous. His Porter's Creek group he 

 referred to the Tertiary with a query. 



Loiighridge. — In the reports of the loth Census Mr. R. H. 

 Loughridge recorded many geological observations. He noted 

 (vol. V, 1882-3, p. 679) the occurrence of Tertiary fossils, now 

 known to be of Midway age, in the Tehuacana hills of Texas. 



On p. 280 of vol. vi, he gave a section of the bluff at Fort 

 Gaines, Ga. , and referred the Midwaj^ limestone in the same to 

 the Claiborne stage. 



White. — Dr. C. A. White called attention to a series of fossils 

 sent to the U. S. National Museum (See Proc. of, vol. iii, p. 

 161), by Mr. Ulrich from near Little Rock, Arkansas. He re- 

 garded them as representing a Cretaceous fauna. 



Later, Bull. No. 4, U. S. Geol. Surv., he made still further 

 remarks on this fauna, describing some of the new species. 

 They were still regarded as of Cretaceous age. 



We see from the above that the observations on the Midway 

 stage during this period were not many nor were the correlations 

 made, accurate. 



Period of 1884-1896. 



Johnson. — Through the co-operation of the United States Geol. 



* Report on the Geology and Agriculture of the State of Missis- 

 sippi, by Eug. W. Hilgard, Ph. D., State Geologist. Printed by 

 order of the Legislature, E. Barksdale, State Printer, Jackson, 

 Miss., i860, 8vo, 391 pp., map and sections. See pp. 85, 87, 109. 



tjr. Ac. Nat. Sci., Phila., vol, iv, i860, p. 389, et seq. 



J Am. Jr. Sci., vol. xxxvii, 1864, p. 360. 



