128 



SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1921. 



sutures not depressed, marked by darker lines 

 of shell material. Length 0.6 millimeter. 



Type specimen from station 6647, Chicka- 

 sawhay River 1^ miles southwest of Boice, 

 Miss. It also occurred at these stations: 



6447. Glass Bayou, Vicksburg, Miss. 



6452. Mint Spring Bayou, Vicksburg, Miss. 



7671. "Brown's Cave," Leaf River, Miss. 



Specimens were very rare at all these sta- 

 tions. The typical form of the species occurs 

 in the present oceans in the warmer parts of 

 the Atlantic and in the Indo-Pacific. It has 

 not been recorded as a fossil in the American 

 Tertiary. 



Buliminella contraria (Reuss) Cushman. 



Rotalina contraria Reuss, Deutsch. geol. Gesell. Zeitschr., 



vol 3, p. 76, pi. .5, fig. 37, 1851. 

 Buliminella contraria (Reuss) Cushman, U. S. Nat. Mue. 



Bull. 71. pt. 2, p. 89, figs. 143 a-c (in text), 1911. 

 Bulimina contraria ( Reus.s i II. B. Brady, ChallfngerRept., 



Zoology, vol. 9, p. 409, pi. 54, figs. IS a-c, 1884. 



Test coiled in a depressed spire, umbilicate, 

 the chambers numerous, slightly inflated; 

 sutures distinct, slightly depressetl; wall smooth, 

 calcareous; aperture chstinctly bulimine, loop- 

 like, rather long and narrow, extending to the 

 umbihcus; color white. Length 0.65 miUi- 

 meter. 



There is a single specimen from station 6647 

 (Chickasawhay River 1^ miles southwest of 

 Boice, Miss.) which seems to be nearer to this 

 than to any other species of the genus. The 

 records for B. contraria are mostly from the 

 south Pacific. Brady records one specimen 

 from off the Azores, and I have recorded it from 

 ofl' the Hawaiian Islands. Bagg records very 

 small sjiecimens from the Pliocene sands of 

 San Pedro, Calif. This is another of the species 

 wliich seems to show the relation oi the lower 

 Oligocene of the Coastid Plain of the United 

 States to the recent fauna of the Indo-Pacific. 



Genus CASSIDULENA DOrbigny, 1826. 

 Cassidulina crassa D'Orbigny. 



Cassidulina cras.ia D'Orbigny, Voyage dans I'Amerique 



meridionale, Foraminiferes, p. 56, pi. 7, figs. 18-20, 



1839. 

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



4'29, pi. .54, figs. 4, 5, 1884. 

 Cushman. U. S. Nat Mus. Bull. 71, pt. 2, p. 97, figs 



151 a-c (in text), I9I1. 



Outline subcircular or oval, biconvex, with 

 a broadly rounded peripheral border; chambers 

 rather few, short, and inflated, the surface 

 depressed at the sutures; wall calcareous, per- 



forate, smooth; aperture a long, narrow slit 

 just below and nearly parallel to the periphery 

 of the test. Diameter 0.4 millimeter. 



There are specimens from stations 6447 

 (Glass Bayou, Vicksburg, Miss.) and 6451 

 (Mint Spring Bayou, Vicksburg, Miss.) which 

 seem rather to belong to this species than to 

 C. laevigata D'Orbigny. The periphery has 

 no keel and is lobulate, and the specimens are 

 not so thick as most recent ones. 



Family LAGENIDAE. 



Genus LAGENA Walker and Boys, 1784. 



Lagena laevigata (Reuss) Terrigi. 



Fiisurina laerigntn Reuss, Akad. Wiss. Wien Denkschr., 



vol. 1, p. 366, pi. 46, fig. 1, 1849. 

 Lagena laevigata (Reuss) Terrigi, Accad. pont. Nuovi Lin- 

 cei Atti, vol. 33, p. 177, pi. 1, fig. 6, 1880. 

 H. B. Brady, Challenger Rept., Zoology, vol. 9, p. 473, 



pi. 114, figs. 8 a, b, 1884. 

 Cushman, U. S. Nat. Mus. Bull. 71, pt. 3, p. 7, pi. 2, 

 fig. 1, 1913. 



Test subglobose, compressed, somewhat py- 

 riform in front view, elliptical in cross section; 

 wall smootii, transparent in thin specimens or 

 opaque in more thickened ones, along the lat- 

 eral .margins usually clear, even in thickened 

 specimens; aperture elongate, fairly narrow, 

 connecting with the interior by a fairly long 

 entosolenian neck. Length 0.45 millimeter. 



A single specimen from station 6451 (Mint 

 Sprmg Bayou, Vicksburg, Miss.) can be re- 

 ferred to this species. It is small and has the 

 characteristic shape. 



Lagena striata (D'Orbigny) Reuss var. substriata 

 Williamson. 



Plate XXIX, figure 10. 



Lageiui substriata Williamson, Annals and Mag. Nat. Hiat., 

 2d ser., vol. 1, p. 15, pi. 2, fig. 12, 1848. 



Lagena. vulgaris var. substriata Williamson, Recent Fora- 

 minifera of Great Britain, p. 7, pi. 1, fig. 14, 1858. 



Lagena striata (D'Orbigny) Reuss var. substriata William- 

 son. Cushman, U. S. Nat. Mus. Bull. 71, pt. 2, p. 

 20, pi. 8, figs. 1-3, 1913. 



Variety differing from the typical species in 

 the more elongate body, long tapering neck, 

 costulate surface extending up onto the neck, 

 often to its end, and usually spirally arranged 

 on the neck. Length 0.4 to 0.5 millimeter. 



A single very typical specunen of this variety 

 was found at station 7671, ''Brown's Cave," 

 Leaf River, Miss. The neck is somewhat 

 broken, but the general form of the test and 

 the ornamentation are those of the variety. 



