142 



SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1921. 



the outline of the chamber; surface smooth, 

 shiny; sutures not very distini't; aperture 

 nearly circular with a short, simple tooth. 

 Length 1.25 milluneter, breadth 1 millimeter. 



Type specimen from station 6448, Glass 

 Bayou, Vicksburg, Miss. 



This species has a peculiar rounded form, a 

 smooth, shiny surface, and the periphery 

 slightly angled. 



Quinqueloculina tessellata Cushman, n. sp. 



Plate XXXIII, figure 8; Plate XXXIV, figure 1. 



Test elongate, fusiform, in transverse section 

 much angled; periphery rather sharply angled, 

 sides flat and very slightly convex, apertural 

 end very little extended; sutures not very 

 distinct; surface ornamented by longitudinal 

 rows of rather large pits, five or six rows on 

 each side of the largest chamber. Length 1 .25 

 millimeters, breadth 0.5 milluneter. 



Typo specunen from station G447, Glass 

 Bayou, Vicksburg, Miss. This form also oc- 

 curred at station 6451, Mint vSpring Bayou, 

 Vicksburg, Miss. It was rare at both stations. 



This is a peculiarly ornamented species, 

 reminding one somewhat of the pattern found 

 in some of the Miliolidae of the Eocene of the 

 Paris Basin. 



Quinqueloculina vulgaris D'Orbigny. 

 Plate XXXII, figures 9, 10. 



Quinqueloculina vuli}aris D'Orbigny, Annales sci. nat. , 



V(il. 7, p. 302, No, 33, 1826. 

 Cushman, II. S. Nat. Mus. Bull. 71, pt. 6, p. 46, 



pi, 11, fig. 3, 1917. 

 Miliolina vulgaris Heron-Allen and Earland, Zonl. Soc. 



London Trans., vol. 20, p. 569, 1915. 



Test short and stout, about as loiig as 

 wide, in front view orbicular; chambers in 

 transverse section roughly triangular, the 

 periphery bluntly angled, sides straight or 

 slightly convex; sutures distinct, wall smooth; 

 apertural end not contracted or produced; 

 aperture elongate, narrow, with a tooth bifid 

 at the tip, in front view projecting shghtly 

 above the border of the aperture. Length 

 about 0.75 milluneter. 



Specimens were conamon in the Mint Spring 

 marl at station 644S, Glass Bayou, Vicksburg, 

 Miss., and less so at the following stations: 



6447. Glass Payou, \'icksliurg, Miss. 



6451, 6452. Mint Spring Bayou, Vicksburg, Miss. 



Quinqueloculina seminulum (Linnaeus) D'Orbigny. 



Serpula seminulum Linnaeus, Systema naturae, 10th ed. 



p. 786, 1758; 13th ed. (Gmelin's), pp. 37, 39, 1788. 

 Quinqueloculina seminulum D'CJrbigny, Annales sci. nat., 



vol, 7, p. 303, No. 44, 1826. 

 Cushman, U. S. Nat. Mus. Bull. 71, pt. 6, p. 44, 



pi. 11, fig. 2, 1917. 

 Milinliaa seminulum Williamson, Recent Foraminifera of 



Great Britain, ]>. 85, pi. 7, figs, 183-185, 1858, 

 n, B, Brady, Challenger Rejit., Zoology, vol, 9, p. 157, 



pi. 5, figs, 6a-c, 1884. 



Test somewhat longer than broad, smooth, 

 peripheral margins rounded; sutures distinct; 

 apertural end not exserted; aperture fairly 

 large, oval, with a simple tooth becoming bifid 

 at the free end. Length 1.5 milUmeters or 

 less. 



Specimens that may ])e referred to tliis 

 common species were collected at three stations 

 in the Mint Spi'ing marl, as follows : 



6447, Glass Bayou, Vicksburg, Miss, 



6451, 6452. Mint Spring Bayou, Vicksburg, Miss. 



Quinqueloculina contorta D'Orbigny. 



Plate XXXIV, figures 2, 3. 



Quinqueloculina contorta B'(lrbigny, Foramiiiifferes fossiles 

 du bassin tertiaire de Vienne, p. 298, pi. 2l», figs, 

 406, 1846, 



Test elongate, oval; chambers narrow, of 

 uniform width; periphery flattened, especially 

 in the middle; sides flat or shghtly concave, 

 very shghtly if at all extended at the apertural 

 end; aperture rounded with a simple tooth; 

 sutures distinct; sin-face smooth, flattened, 

 periphery duU, sides somewhat glossy. Length 

 1 millimeter or less. 



Specimens that can be referred to this species 

 were fairly common at four stations in the 

 Mint Spring marl, as follows: 



6447, 6448. Glass Bayou. Vicksburg, Miss, 



6451, 6452. Mint Spring Bayou, Vicksburg, Miss, 



This species was described by D'Orbigny in 

 his report on the Foraminifera from the 

 Tertiary Vienna Basin. Our specimens are 

 very similar to those figured by him. 



Quinqueloculina lamarckiana D'Orbigny. 



Quinqueloculina lamarckiana D'()rbigny, in De la Sagra, 

 Histoire physique, politique et naturelle de I'tle de 

 Cuba, Foraminifferes, p, 187, pi. 11, figs. 14, 15, 

 1839. 



Test short and broad; chambers with a 

 sharp peripheral angle, sides slightly convex; 

 apcrature not produced; sutures distinct; sur- 

 face smooth and shiny. Length 1 millimeter. 



