134 



SHORTER CONTRIBITTIONS TO GENERAL GEOLOGY, ir»21. 



chambers, especially where they are not close- 

 set, have the distinct triangular shape which 

 characterizes the type specimens. 



Uvigerina pigmea D'Orbigny. 



Plate XXXII, figure 2. 



Uriqeiina pigmea D'Clrbigny, Annales sci. uat., vol. 7, 



p. 209, pi. 12, f.gs. 8, 9, Modules, No. C.?, 1820. 

 Uvigerina piiqmaea D'Orbigny, Foraminifferes fossiles du 



ba.ssin tertiaire de Vienna, p. 190, pi. 11, figs. 25, 



2(i, 184(>. 

 II. P. Brady, Challenger ^ept., Zoologj', vol. 9, p. 57f), 



pi. 74, figp. 11-14, 1884. 

 Cushman, U. S. Nat. Mus. Bull. 71, pt. 3, p. 90, pi. 42. 



fig. 1; pi. 44, fig. 5, 1913; U. S. Nat. Mus. Bull. 103, 



p. 03, pi. 22, fig. 4, 1918; V. S. Geol. Survey Bull. 



070, p. r3.5, 1918. 



Test subcylindrical, triserially spiral; cham- 

 bers numerous, inflated; sutures deep; wall 

 ornamented by numerous longitudinal costae, 

 those of each chamber usually independent of 

 those of adjacent chambers; aperture with a 

 short cylindrical neck and phialine lip. Length 

 0.75 to i millhneter. 



Specimens that may be referred to this 

 species were found at the following stations: 



0447. tila?s Bayou, \'icksl)urg, Miss. 



04.52. Mint Spring Bayou, Vicksburg, Miss. 



0047. Chickasawhay River IJ miles .southwest of Boice, 

 Miss. 



7071. "Brown's Cave," Leaf River, MLss. 



It has occiUTcd in the Miocene of Maryland 

 (Bagg), and in the St. Marys ( *) formation 

 in a well at Norfolk, Vtx. (depth 645 feet). I 

 have also recorded it from the Culel)ra forma- 

 tion of the Canal Zone, and it may occur in 

 the Miocene of the Gatim formation of the 

 Canal Zone. 



FamUy GLOBIGERINIDAE. 



Genus GLOBIGERINA DOrbigny, 1826. 



Globigerina bulloides D'Orbigny. 



Glohigerina huUoides D'Orliigny, Annales .sci, nat., vol. 



7, p. 277, No. 1, Modeles, Nos. 17 and 70, 1820. 

 H. B. Brady, Challenger Kept., Zoology, vol. 9, p. .593, 



pi. 77; pi. 79, figs. 3-7, 1884. 

 Cushman, U. S. Nat. Mus. Bull. 71, pt. 4, p. .5, pi. 2, 



figs. 7-9; pi. 9, 1914; U. S. Nat. Mus. Bull. 103, 



p. 04, 1918; U. S. Geol. Survey Bull. 070, p. 12, 



pi. 3, fig. 2; p. .50, pi. 3, figs. 4, 6, 1918; Carnegie lust. 



Wa.'iihiugton Pub. 291, p. 38, 1919; U. S. Geol. 



Survey Prof. Paper 129, p. 95, pi. 19, figs. 1-3, 1922. 



Test subglobose, spual, made up of a few 

 inflated chambers, all visible from the dorsal 

 side, three to four visible from the ventral side; 

 sutures deep, surface reticulate. 



This common species, which has been re- 

 corded in the Pliocene, Miocene, and Oligocene, 

 occurs in the Mint Spring marl at four stations, 

 as follows: 



0447. (ilass Bayou, Vickslnirg, Miss. 



0451, 0452. Mint Spring Bayou, Vickslmrg, Miss. 



7071. "Brown's Cave," Leaf River, Miss. 



Globigerina dulertrei D'Orbigny. 



Glohigerina daterlrei U'<Jrljigny, in De la .Sagra, Histoire 

 physique, politique et naturelle de I'ile de t'ulia, 

 Foramiiuferes, p. 95, pi. 4, figs. 19-21, 1839. 

 H. B. Brady, Challenger Rept., Zoology, vol. 9, p. 



001, pi. 81, figs, la-c, 1884. 

 Cushman, U. S. Nat. Mus. Bull. 71, pt. 4, p. 8, 1914. 



Test rounded, the dorsal side slightly con- 

 vex, the ventral sitle more strongly convex, 

 composed of about three whorls, the last one 

 consisting of four to five chambers, much 

 inflated, especially the later ones, umbilicate; 

 aperture comparatively small, a single arched 

 opening near the uml)ilical edge of the last- 

 formed chamber. Diameter 0.60 millimeter 

 or less. 



Specimens apparently belonging to tliis 

 species, which D'Orbigny described from mate- 

 rial collected in the West Indies, occurred at 

 three stations, as follows: 



0451. Mint Spring Bayou. Vickslmrg, Miss. 



0047. Chickasawhay River IJ miles southwest of Boice, 

 Miss. 



7071. "Brown's Cave," Leaf River, Miss. 



Family ROTALIIDAE. 



Genus SPIRILLINA Ehrenberg, 1841. 



Spirillina limbata H. B. Brady var. bipunctata Cushman, 

 n. var. 



Piatr- XXXII, figures 3-5. 



Test very similar in general to that of 

 Spirillina limbata but difl'ering in the character 

 of the ornamentation, the area of the dorsal 

 surface being ornamented in the adult of tliis 

 variety by a double series of deep pimctations 

 inside the raised carina. 



Type specimen from station 6647, Chicka- 

 sawhay River l\ miles southwest of Boice, 

 Miss. This variety is also present in the Mint 

 Spring marl at the following stations: 



0447. Glass Bayou, Vicksl>urg, Miss. 



0451, 6482. Mint Spring Bayou, Vieksbiu'g, Miss. 



7071. ' ' Brown's Cave," Leaf River, Miss. 



In recent seas *S'. limbata is known from the 

 Pacific, being one of the forms that are charac- 

 teristic of the Indo-Pacific region, and it is also 



