22 BULLETIN 10 4, UNITED STATES NATIONAL MUSEUM 



This genus has been recorded from the Carboniferous but it is 

 probable that the records are based on species of Agathammina and 

 not on true Quinquelocnlina. 



The groupings of species as given here are purely artificial and 

 simply for convenience. 



SPECIES WITH ARENACEOUS EXTERIOR 



QUINQUELOCUUNA AGGLUTINANS d'Orbigny 



Plate 1, Figures 1 a-c 



Quinqueloculina agglutinans d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. 

 Cuba, 1839, " Foraminiferes," p. 195, pi. 12, figs. 11-13. — Cushman, Proc. 

 U. S. Nat. Mus., vol. 59, 1921, p. 65, pi. 15, figs. 9, 10, text fig. 3; Publ. 

 311, Carnegie Instit. Washington, 1922, p. 63; Publ. 344, 1926, p. 81. 



Test longer than broad; wall, at least on the exterior, composed of 

 agglutinated sand-grains, forming a roughened surface; the periphery 

 of the chambers broadly rounded; sutures fairly distinct; aperture 

 slightly extended into a subcylindrical neck which, in well-preserved 

 specimens, has 2 teeth extending in toward the center from opposite 

 sides, each thickened toward the end, lip slightly everted, thin. 

 Maximum length, 1.30 mm.; breadth, 0.85 mm.; thickness 0.65 mm. 



D'Orbigny originally described this species from Jamaica and 

 Cuba. It is generally common in rather shallow water in the gen- 

 eral West Indian region where it is a well-defined species. The ref- 

 erences to it elsewhere are many, but it is very doubtful if the species 

 is at all so widely distributed as would seem from the numerous 

 records. At the Tortugas the species occurred at all 20 of the stations 

 from which material was recorded. 



The broadly rounded periphery will distinguish this species from 

 the other common arenaceous species of the West Indian region. 



QUINQUELOCULINA BIDENTATA d'Orbigny 



Plate 1, Figures 2 a-c 



Quinqueloculina bidentata d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. 

 Cuba, 1839, "Foraminiferes," p. 197, pi. 12, figs. 18-20.— Cushman, Proc. 

 U.S.Nat. Mus., vol. 59, 1921, p. 65, pi. 15, figs. 11, 12; Publ. 311, Carnegie 

 Instit. Washington, 1922, p. 64; Publ. 342, 1924, p. 59, pi. 22, figs. 1, 2; 

 Publ. 344, 1926, p. 81. 



Test somewhat longer than broad; chambers distinct; periphery 

 squarely truncate; wall composed of rather coarse sand-grains ; aper- 

 tural end projecting, with a slightly thickened lip; aperture with a 

 thin tooth with a broad, bifid tip. Maximum length, 1.50 mm.; 

 breadth, 1.05 mm.; thickness, 0.70 mm. 



The type locality for this species is from shore sands of Cuba, 

 given by d'Orbigny. The species has now been found well distributed 



