184 



UNITED STATES NATIONAL MtTSEXJM BULLETIN 215 



whorl, resulting from less rapid increase in chamber 

 size than in G. triloculinoides. A large suite of topo- 

 types of 6. triloculinoides contains specimens with all 

 of these variations and many others. Qlohigerina 

 hornibrooki was defined as differing in having the final 

 chamber smaller than the penultimate one, but the 

 gerontic character of a final chamber of reduced size 

 is common to many species and not of specific impor- 

 tance. 



Olobigerina velascoensis Cushman var. compressa 

 White is merely Olobigerina triloculinoides Plummer 

 with somewhat flattened final chamber. This varietal 

 name is a homonym of 6. compressa Plimuner, 1926. 

 BoUi (1957, p. 78) renamed this homonym as Oloboro- 

 talia tortiva BoUi, new name, but the specimen he 

 figured is a species distinct from that of White and 

 thus must either be otherwise identified or itself made 

 the basis of another specific name. 



Types and occurrence: Figured hypotype (USNM 

 P5814) from the ?lower Danian, zone of Tylocidaris 

 odumi Briinnich Nielsen, Hjerm (western quarry), 

 northwestern Denmark. Collected by J. C. Troelsen. 



Figured hypotype (USNM P5815) 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 County line, 0.5 mile north of the 

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

 lected by A. R. Loeblich, Jr. 



Figured topotype (USNM P5816) from the Wills 

 Point formation, shallow ditch at the road corner 

 southeast of the new Corsicana Reservoir, on the road 

 to Mildred, Navarro Coimty, Texas. Collected by 

 A. R. Loeblich, Jr. 



Figured hypotype (USNM P5817) from the Mexia 

 clay member of the Wills Point formation, in abandoned 

 pit of the Mexia Brick Works at Mexia, Limestone 

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



Figured hypotype (USNM P5818) from the McBryde 

 limestone member of the Clayton formation, in bed of 

 Rock Creek, 0.8 mile south of jimction of Alabama 

 highways 28 and 10, on Alabama highway 10, Wilcox 

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



Figured hypotype (USNM P5819) from the Matthews 

 Landing marl member of the Porters Creek clay at 

 Naheola Landing on the Tombigbee River, SE%, Sec. 

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

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



Figured hypotype (USNM P5697) from the Coal 

 Bluff marl member of the Naheola formation in creek 

 bottom, just west of store at Caledonia, about % mile 

 south of center of Sec. 29, T. 11 N., R. 10 E., Wilcox 

 County, Alabama. Collected by F. Stearns MacNeil. 



Figured hypotype (USNM P5698) from the Salt 

 Mountain limestone, in a limestone sink, % mile north 

 of Salt Mountain, m the NWKNWK, Sec. 34, T. 6 N., 

 R. 2 E., Clarke County, Alabama. Collected by 

 H. T. and A. R. Loeblich, Jr. 



Figured hypotype (USNM P5699) from the type 

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

 west of Brightseat and 0.2 mile south of Sheriff Road, 



Prince Georges County, Maryland. Collected by 

 A. R. Loeblich, Jr. and Richard A. Page. 



Figured hypotype (USNM P5700) from the Aquia 

 formation, 15 to 17 feet above base, 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, reprinted 1945. 

 Collected by A. R. Loeblich, Jr., and Richard A. Page. 



Figured hypotypes (USNM P5123a-e) from the 

 Vincentown limesand, along north bluff of Rancocas 

 Creek, 0.3 to 0.5 mile northwest of Vincentown, 

 Bm-lington County, New Jersey. Collected by A. R. 

 Loeblich, Jr., and Norman Sohl. 



The species also occurs ia the Hornerstown formation, 

 north bank of Shingle Run, a tributary to Crosswicks 

 Creek, 1.0 mile north of New Eg3rpt, Monmouth 

 County, New Jersey. 



Lectotype (Columbia Univ. 19882), here designated, 

 of Olobigerina velascoensis var. compressa White from 

 the Velasco formation, Colimibus Station on the 

 Tampico-Monterey railroad line, Mexico. 



Figm-ed hypotype (USNM P5883) from the Velasco 

 formation, middle bed at road crossing of arroyo 

 halfway between San Jos6 de las Rusias and Soto la 

 Marina, Tamaulipas, Mexico. Collected by R. Wright 

 Barker. 



Globigerina species 



Plate 60, Figures 2a-c 



Remarks: A juvenile specimen of a finely spinose 

 Globigerina is figured, but it is not certain to which 

 species it shoiild be referred. As compared to the 

 associated species, it is less high spired and has fewer 

 chambers per whorl than does G. spiralis BoUi, is much 

 thicker and with fewer chambers per whorl than 

 Globorotalia perclara, new species, and has a more 

 bluntly rounded periphery and less oblique sutm-eson 

 the spiral side than does Globorotalia convexa Subbotina. 

 This form is too rare to be described as a distinct species, 

 however. 



Figured specimen 0.18 mm. in diameter. 



Types and occurence: Figured specimen (USNM 

 P5849) from the Hornerstown formation, north bank 

 of Shingle Run, 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. 



Genus Globigerinoides Cushman, 1927 

 Globigerinoides daubjergensis (Bromumaim) 



Plates 40, Figures la-c, 8a-c; 41, Figures 9a-c; 42, Figures 

 6a-7c; 43, Figures la-c; 44, Figures 7-8c 



Globigerina daubjergensis Bronnimann, Eclog. Geol. Helvetiae, 

 vol. 45 (1952), No. 2, p. 340, text-fig. 1, 1953 



Test free, small, trochospiraJ, high spired; chambers 

 few in number, globular, increasing rapidly in size, 

 forming about two whorls with 3K to 4 chambers in 

 the final whorl; umbilicus small, commonly open, but 

 may become closed by a somewhat overlapping final 

 chamber; sutiu-es distinct, depressed; wall calcareous, 



