2 riSOCEEDIJSIGS OF THE XATIONAL MUSEUM vol. 7G 



All the genera and species here found are, with the exception of the 

 plagic forms, all inhabitants of fairly shallow waters. This, coupled 

 with the abundance of glauconite, would indicate shallow seas, as 

 does the associated molluscan fauna. The fauna as a whole has 

 strong Cretaceous affinities but so many species are new that close 

 comparisons are not possible. When some other well preserved 

 Cretaceous foraminiferal deposits are found we will be better able 

 to compare this fauna with them. 



A very complete account of the larger fauna and the geology of 

 the area is to be found in the very excellent work of Bruce Wade, 

 published as Professional Paper 137 of the United States Geological 

 Survey, (1926), entitled "The Fauna of the Ripley Formation on ^ 

 Coon Creek, Tenn." In this paper Wade goes into detail concerning 

 the geologic relations of the fauna and also the ecologic conditions. 



In this present work the senior author has described all but two of 

 the species and has discussed the entire fauna. The junior author 

 started the work, but economic conditions took him into the field 

 before he had time to more than get started, and the senior author 

 took over the material and followed it to a conclusion. 



The types of this material are the property of the United States 

 National Museum. 



Family LITUOLIDAE 



Genus REOPHAX Montfort, 1808 



REOPHAX CYLINDRICUS H. B. Brady, var. RIPLEYENSIS W. Berry, new variety 



Plate 1, Figure 5 



Test elongate, slightly tapering, straight, ratio of length to diam- 

 eter about 5 : 1, free. Chambers distinct, round, tumid in the middle, 

 about as long as broad, serial, closely attached. Sutures slightly de- 

 pressed; wall thin, composed of many sharp sand grains and little 

 cement. Aperture a ragged hole in the end of the last chamber. 



Length, 1.28 mm. 



This variety is not closely related to the parent species, as shown 

 by the less regular structure. It is related as shown by its general 

 appearance and characteristics. It is the largest Reophax found in 

 the Ripley at this outcrop. 



Holotype.—C2Lt. No. 73661, U.S.N.M. 



REOPHAX COONENSIS W. Berry, new species 



Plate 3, Figure 23 



Test small, cylindrical, straight, short, ratio of length to diameter 

 about 3 : 1, free. Chambers indistinct, usually 3 to 4 in number, 

 tumid in the middle. Sutures slightly depressed, usually very indis- 



