STUDIES IN FORAMINIFERA 



179 



Figured hypotype (USNM P5116) from the Ostrea 

 thirsae beds of the NanafaUa formation, 56 feet above 

 the Midway contact, in road cut 1 .2 miles east of Kim- 

 brough Station, and 0.2 mile east of the Turkey Creek 

 bridge, Wilcox County, Alabama. Collected by A. R. 

 LoebUch, Jr. 



Figured hypotype (USNM P5852) from the Aquia 

 formation, 42 feet above the base of the exposure, west 

 bank of Potomac River, near mouth of Aquia Creek, 

 S. 10° E. of Brent Point, on U. S. Geological Survey 

 Nanjemoy Md.-Va. Quadrangle, 1:62,500, 1913, re- 

 printed 1945. Collected by A. R. LoebHch, Jr., and 

 Richard A. Page. 



Figm-ed hypotype (USNM P5853) from the Horners- 

 town formation, north bank of Shingle Rim, a tributary 

 to Crosswicks Creek, 1.0 mile north of New Egypt, 

 Monmouth County, New Jersey. Collected by A. R. 

 Loeblich, Jr., and Norman Sohl. 



Figured hypotype (USNM P5890) from the Velasco 

 formation, middle bed at road crossing of arroyo half- 

 way between San Jose de las Rusias and Soto la Marina, 

 TamauUpas, Mexico. Collected by R. Wright Barker. 



This species also occurs in the Salt Mountain lime- 

 stone of Alabama, and has been recorded from the 

 Aquia formation of Friendly, Maryland. 



It was originally described from the Paleocene of the 

 northwest Caucasus, USSR. 



Chiloguembelina midwayensis (Cushman) 

 Plates 41, FiotrRE 3; 43, Figures 7a, b; 45, Figures 9a, b 



Gumhelina midwayensis Cushman, Contr. Cushman Lab. Foram. 



Res., vol. 16, pt. 3, p. 65, pi. 11, fig. 15, 1940. 

 Chiloguembelina midwayensis (Cushman) Loeblich and Tappan 



(part; not Gumhelina viorsei Kline, 1943), Journ. Washington 



Acad. Sci., vol. 46, No. 11, p. 340, 1956. 



Test free, small, flaring rapidly, commonly with 

 about five pairs of biserially arranged, broad and 

 relatively low chambers; sutures distinct, slightly de- 

 pressed and oblique; wall calcareous, finely perforate, 

 surface smooth, but terminal face of the last pair of 

 chambers may be finely hispid; apertm-e at the base of 

 the final chamber, a broad open arch, with a prominent 

 apertural flap at one side, causing the aperture to 

 appear directed to one side of the test. 



Hypotypes range in length from 0.23 to 0.25 mm. 



Remarks: This species was originally described from 

 the Midway group of Alabama and appears to be 

 restricted to the lower and middle Paleocene. It is 

 here recorded from the McBryde limestone member of 

 the Clayton formation, the Wills Point formation and 

 the Matthews Landing marl member of the Porters 

 Creek clay. 



Types and occurrence: Figured hypotype (USNM 

 P5829) from the McBryde Hmestone member of the 

 Clayton formation, in bed of Rock Creek, 0.8 mile 

 south of junction of Alabama highways 28 and 10, on 

 highway 10, Wilcox County, Alabama. Collected by 

 A. R. Loeblich, Jr. 



Figured hypotype (USNM P5830) from the Matthews 

 Landing marl member of the Porters Creek clay, at 



Naheola Landing, Tombigbee River, SEX, Sec. 30, 

 T. 15 N., R. 1 E., 11 miles east of Jachin, Choctaw 

 County, Alabama. Collected by A. R. Loeblich, Jr. 



Figured hypotype (USNM P5831) from the WiUs 

 Point formation, 200 feet east of the bridge over 

 Tehuacana Creek, 4 miles north of Mexia on the 

 Mexia-Wortham road. Limestone County, Texas. 

 Collected by A. R. LoebUch, Jr. 



Chiloguembelina morsel (Kline) 



Plates 40, Figures 2a, b; 41, Figure 4; 42, Figures la, b; 

 43, Figures 2, 6a, b 



GUmbeliiia morsei Kline, Mississippi Geol. Surv. Bull. 53, p. 44, 



pi 7, fig. 12, 1943. 

 Chiloguembelina midwayensis (Cushman) Loeblich and Tappan 

 (part), Journ. Washington Acad. Sci., vol. 46, No. 11, 

 p. 340, 1956. 



Test free, small, relatively narrow and elongate; 5 to 

 7 pair of biserially arranged subglobular, inflated 

 chambers, of nearly equal breadth and height; sutures 

 distinct, depressed, nearly horizontal; wall calcareous, 

 finely perforate, terminal part finely hispid; aperture 

 a relatively high arch with a narrow, everted lip at one 

 side expanding into a relatively wide apertural flange 

 at the opposite side, and thus directing the aperture 

 somewhat to one of the flat sides of the test. 



Hypotypes range from 0.23 to 0.30 mm. in length. 



Remarks: In an earlier paper the present writers 

 (LoebUch and Tappan, 1956, p. 340) considered this 

 species a synonym of C. midwayensis (Cushman). 

 Additional material has shown that C. morsei can be 

 distinguished by the naiTower test, more globular 

 chambers and more deeply constricted sutm-es. It 

 differs from C. crinita (Glaessner) in the less rapidly 

 flaring test and in having globular rather than somewhat 

 low and broad chambers. 



Types and occurrence: Figured hypotype (USNM 

 P5854) from the Danian, calcarenite at Erslev, Mors, 

 north of the viUage, west of Toving road, Denmark, 

 Collected by J. C. Troelsen. 



Figured hypotype (USNM P5855) from the McBryde 

 limestone member of the Clayton formation, in bed of 

 Rock Creek, 0.8 miles south of the junction of Alabama 

 state highways 28 and 10 on Alabama highway 10, 

 Wilcox County, Alabama. CoUected by A. R. 

 Loeblich, Jr. 



Figured hypotype (USNM P5856) from the Kincaid 

 formation, in a small stream bank on the east side of 

 the road to Lund, 3 miles northwest of Elgin on the 

 Bastrop-Travis coimty line, 0.5 miles north of the 

 jimction with the Austin-Elgin highway, Texas. Col- 

 lected by A. R. Loeblich, Jr. 



Figured hypotype (USNM P5857) from the Wills 

 Point formation, 200 feet east of the bridge over 

 Tehuacana Creek, 4 miles north of Mexia on the Mexia- 

 Wortham road. Limestone County, Texas. CoUected 

 by A. R. LoebUch, Jr. 



Figured hypotype (USNM P5858) from the type 

 locality of the Brightseat formation, 1 mile west-south- 

 west of Brightseat and 0.2 mile south of Sheriff Road, 



