354 



CHALMER L. COOPER 



or elevated central boss; shell perforate; 

 diameter, 0.31 mm.; thickness, 0.12 mm. 



This species is common in the two faunal 

 zones of the Midway of Texas and serves to 

 distinguish these horizons from the under- 

 lying Cretaceous formations. It also occurs 

 in the lower Wilcox of Alabama. 



Anomalina midwayensis (Plummer) 

 Plate 54, figures 15-17 



Truncatulina midwayensis Plummer, 1927, Texas 

 Univ. Bull. 2644, p. 141, pi. 9, figs. 7a-c, pi. 15, 

 figs. 3a-b; Midway group, Paleocene, Texas. 



Anomalina midwayensis, Cushman, 1940, Cush- 

 man Lab. Foram. Research Contr., vol. 16, 

 p. 73, pi. 12, fig. 18; Midway group, Paleocene, 

 Texas. 



Test biconvex, little compressed; cham- 

 bers 9 to 10 in last whorl, punctate; sutures 

 strongly elevated, broad near umbilicus but 

 separated from it, tapering toward margin, 

 curved; slit-like aperature at base of septal 

 face; diameter, 0.41 mm., thickness, 0.22 

 mm. 



This form is identical with the Texas 

 Midway form in all respects except that it is 

 somewhat thicker and the sutures a little 

 wider, especially near the umbilicus. The 

 species is found throughout the Midway of 

 Texas and in the upper Midway of Alabama. 



Genus Cibicides Montfort 



CiBiciDES alleni (Plummer) 



Plate 54, figures 24, 25 



Truncatulina alleni Plummer, 1927, Texas Univ. 

 Bull. 2644, p. 144, pi. 10, figs. 4a-c; Midway 

 group, Paleocene, Texas. — Cushman, 1940, 

 Cushman Lab. Foram. Research Contr., vol. 

 16, p. 73, pi. 12, fig. 19; Midway group, Paleo- 

 cene, Alabama. 



Test unequally biconvex, more rounded 

 on ventral side; peripheral margin slightly 

 acute, somewhat lobate; chambers, 9? in 

 last whorl, coarsely punctate; sutures and 

 periphery conspicuously marked by shell 

 material; sutures curved, gently tapering 

 from large, smooth umbilicus; aperature 

 large, arched, extending far down on ventral 

 side; diameter, 0.60 to 0.80 mm. 



It is common in the middle and upper 

 Midway of Texas and Alabama but is rare in 

 the Navarro. 



Cibicides vulgaris (Plummer) 

 Plate 54, figures 28, 29 



Truncatulina vulgaris Plummer, 1927, Texas 

 Univ. Bull. 2644, p. 145, pi. 10, figs. 3a-c; 

 Midway group, Paleocene, Texas. — Cushman, 

 1940, Cushman Lab. Foram. Research Contr., 

 vol. 16, p. 73, pi. 12, fig. 21; Midway group, 

 Paleocene, Alabama. 



Test unequally biconvex; periphery 

 broadly rounded, lobate; chambers 8 in last 

 whorl, later ones turgid; sutures curved, 

 tapering, elevated by shell material, walls 

 coarsely punctate; slit-like aperature ex- 

 tending from periphery to umbilicus; diam- 

 eter, 0.60 to 0.85 mm. 



It is abundant in the upper and rare in the 

 lower Midway of Alabama and Texas. 



REFERENCES 



Cushman, Joseph A., 1940, Midway Foraminif- 

 era from Alabama: Cushman Lab. Foram. 

 Research Contr., vol. 16, pp. 51-73. 



Farrar, Willard, and McManamy, Lyle, 

 1937, The geology of Stoddard County, Mis- 

 souri: Missouri Geol. Survey, 59 Bien. Rept., 

 App. 6, pp. 24-29. 



Harris, G. D., 1896, The Midway stage: Bull. 

 Am. Paleontology, vol. 1, no. 4, pp. 18-22. 



Kansas Geol. Society Guidebook, 13th Ann. 

 Field Conference, 1939. 



Lamar, J. E., and Sutton, A. H., 1930, Cre- 

 taceous and Tertiary sediments of Kentucky, 

 Illinois and Missouri: Am. Assoc. Petroleum 

 Geologists Bull., vol. 14, pp. 845-866. 



McFarlan, Arthur C, 1943, Geology of Ken- 

 tucky, Kentucky Univ. 



Plummer, Helen J., 1927, Foraminifera of the 

 Midway formation in Texas: Texas Univ. 

 Bull. 2644. 



Sardeson, F. W., 1898, The so-called Cretaceous 

 deposits in southeastern Minnesota: Jour. 

 Geology, vol. 16, pp. 679-691. 



Stafford, J. M., 1864, On the Cretaceous and 

 superior formations of west Tennessee: Am. 

 Jour. Sci., ser. 2, vol. 37, pp. 360-372. 



Stewart, Dan R., McManamy, Lyle, and Mc- 

 Queen, Henry S., 1943, Occurrence of baux- 

 ite clay in Stoddard County, Missouri: Mis- 

 souri Geol. Survey, 62 Bien. Rept., App. III. 



Stose, George W., 1932, Geologic map of the 

 United States. U. S. Geol. Survey. 



TouLMiN, Lyman D., 1941, Eocene smaller 

 Foraminifera from the Salt Mountain lime- 

 stone of Alabama: Jour. Paleontology, vol. 15, 

 pp. 567-611, pis. 78-82. 



Weller, J. Marvin, 1939, Geologic map of 

 lUinois: Illinois Geol. Survey, Blue line print 

 1:500,000. 



Whitlatch, Geo. I., 1940, The clays of west 

 Tennessee: Tennessee Geol. Survey, Bull. 49. 



