130 



SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1921. 



aperture radiiite. Length as much as 10 milU- 

 meters when complete. 



Specimens were present in material from 

 the I'oUowing stations: 



0-152. Mint Spring Bayou, Vicksburg, Miss. 



6G47. Chickasawhay River 1} miles southwest nf Boicc, 

 Miss. 



7(i71. ''Bruwn's Cave," Leaf River, Miss. 



This is cjuite possibly the same as the 

 species from the Byram marl noted as a "single 

 fragmentary specimen." ^ 



Nodosaria sp.? 



Plate XXX, ligure 5. 



There is a single specimen of Nodosaria 

 from station 7671 ("Brown's Cave," Leaf 

 River, Miss.) which may possibly be the 

 young of Nodot^aria ohliipia ])Ut is here noted 

 and figured that it may be on record for com- 

 parisons witli forms from other horizons. 



Genus CRISTELLARIA Lamarck, 1812. 

 Cristellaria convergens? Bornemann. 



Crislellaria conraiirns Bornemann, Deutseli. geol. Gesell. 



Zeitschr., vol. 7, 1855, p. 327, pi. )3, tigs. 16, 17. 

 H. B. Brady, ChuUcnyer Jlept., Zoology, vol. 9, p. 546, 



pi. (ill, figs. 0, 7, 1884. 

 t^ushnian, V. S. Nat. Mus. Bull. 71, \i\ . 'i. p. (18, pi. 



:;4, lin, :;, l!ii:!. 



Test oval, biconvex, closely coiled; cham- 

 bers triangular, the last-formed one drawn 

 out to a poinl at the a])ertural end; sutures 

 hardly visil)le, the chambei's embracing to the 

 umbo; wall smooth and tliick. Length about 

 1 milliiuclcr. 



Single spc^ciinens that seem to be at least 

 ([uesliouably this species were found at two 

 stations: 



()(i47. Chieka.sawhay Itivrr 1 ', iiiilcs soutliwe.-t of I'.oice, 

 Miss. 



7671. "Brown's ("a\e," Beat lUvcr, .Miss. 



Cristellaria rotulala (Lamarck) D'Orbigny. 



I'late XXXII, figine 1. 



Lrtiticiililrx rotiiltiln Lamarck, Annates du Museum, vol. 5, 



p, 188, l\o. ::, 1804; vol. 8, pi. 02, fig. II, ISUO. 

 CritsUllaria niliiliilu (Lamarck) D'Orbigny, Soc. geol. 

 France Mem., Isl ser., vol. 4, p. 20, pi. 2, fii,'s, 10-18, 

 1840. 

 U. B, Brady, ( 'liuUciKjcr Rept., Zoology, vol. 0, \k 547; 



pi. 09, figs. l;!«, /), 1884, 

 Cushman. 1', S. Nat. Mus. Bull. 71. pt. 'A. p. 00. pi. o5, 

 fig. ;{, 19i;!. 



•Cushman, J. ,\., U. S. Geol. Survey Prof. l'a|ier 129, p. !)3, 1>.I22 

 (I'rof. Paper r2y-E;. 



Test large, closely coiled; chambers numer- 

 ous, lenticular, biconvex; wall smooth, tliick; 

 jieripheral margin rather acute but not dis- 

 tinctly carinate; apertures of all chambers of 

 visible test usually apparent. Length 1.5 

 to 2 millimeters. 



Specimens that may be referred to this and 

 the followuig species occurred in considerable 

 numbers at station 7671, " Brown's Cave," Leaf 

 liiver. Miss. 



Cristellaria cultrata (Montforti Parker and Jones. 



riate XXXI, ligiueS. 



Kobulus cuhmlut: MimtfortV, Concliyliologie systemati(|ue, 



vol. 1, 1). 214, o4'' genre, 1808. 

 CrislilUiria cultratii (Montfort) Parker and Jones, Pliilos. 



Trans., vol. 155. p. :M4, pis. 13, 17, IS; pi. 16, fig. 5, 



1805. 

 H. B. Brady, Vhalhntjer Rept., vol. 9, \>. 550, \>\. 70, 



figs. 4-6, 1884. 

 (.'ushmaii. L. S. Nat. Mus. Bidl. 71, pt. 3, p. 04. pi. 29, 



fii,'. 5. 1913. 

 KolniUmi cultrala (Montfort) D'Orbigny, Annates sii. nat., 



vol. 7, ]). 2H7, No. 1, .Modeles, No. 82, 1S26; Forami- 



niferes fossiles du bassin tertiaire de Vienne, p. 96, 



pt. 4, figs. 14, 15, 1840. 



Test very similar to that of ('. rotulata, but 

 with th(> atlded character of a peripheral keel 

 of greater or less extent. Diameter 2 milli- 

 meters or less. 



Spe<'imens that may l)e considered 0. cidtrata, 

 having a broader keel and somewhat different 

 shape, with fewei' chambers than C. rotulata, 

 occurred with that sjjecies at station 7()71, 

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



Cristellaria vicksburgensis Cushman, n. sp. 



Plate XXXI, figures 0, 7. 



Test composed of few chamlx'rs, seven to 

 eight in the visible coil; surface generally 

 smooth, except on the sutures, which are 

 marked by rather broad, curved, raised ridges, 

 those near the earlier |)art of the coil broken 

 into roundeil knobs, especially near the um- 

 l)ilical area, the later ones more continuous; 

 [leriphery angled, the early portion carmate; 

 apertural face smooth and somewhat concave 

 with acute projecting angles; aperture radiate 

 at the angle of the chamber. Length 0.65 

 to 1 millimeter. 



Type specimen from station 6647, Chicka- 

 sawhay River 1 ', miles southwest of Boice, 



