FORAMINIFERA OF THE ATLANTIC OCEAN 



33 



DISCORBIS TABERNACULARIS (H. B. Brady) 



This species, characteristic of warm tropical waters of the Indo- 

 Pacific, was recorded by Brady in the Challenger Report from off 

 St. Vincent, Cape Verde Islands in 11 fathoms. Heron- Allen and 

 Earland^" record it from Selsey Bill, Sussex, England. I have a single 

 specimen of a high spired form off Miami, Fla., that remotely resem- 

 bles this species, but is not identical with it. 



DISCORBIS VALVULATA (d'Orbigny) 



Plate 7, figures 3 a-c 



Rosalina valvulata d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 271, No. 4; in 

 De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, "Foraminiferes," p. 103, pi. 3, 

 figs. 21-23; in Barker- Webb and Berthelot, Hist. Nat. lies. Canaries, 1839, 

 "Foraminiferes," p. 136, pi. 2, figs. 19-21. 



Discorbina valvulata Jones and Parker (?), Quart. Journ. Geol. See, vol. 28, 

 1872, p. 114.— Goiis, Kongl. Svensk. Vet. Akad. Handl., vol. 19, No. 4, 

 1882, p. 106, pi. 8, figs. 258-261.— Woodward, The Observer, vol. 4, 1893, 

 p. 176.— Goiss, Bull. Mus. Comp. ZooL, vol. 29, 1896, p. 69. 



Discorbis valvulata Cushman, Publ. 344, Carnegie Instit. Washington, 1926, 

 p. 78. 



Test longer than broad, plano-convex, spire very low and com- 

 pressed, ventral side flattened or concave, periphery with a rounded 

 keel; chambers distinct, increasing rather rapidly in size, on the ven- 

 tral side with a distinct valvular lip over the umbilical region; sutures 

 on the dorsal side somewhat thickened, not depressed, curved, ven- 

 trally sinuate; wail smooth, finely perforate; aperture elongate, 

 narrow, below the valvular projection of the chamber near the 

 umbilicus. 



Length, 0.50 mm.; breadth, 0.30 mm. 



In the West Indian region this is a well characterized species, but 

 is not at all common although widely distributed. The somewhat 

 thickened keel of the chambers, the elongate form and peculiar sutures 

 of the ventral side will distinguish it. 



It occurs fossil in the Miocene, Choctawha tehee marl, of Florida. 



Discorbis valvulata — Material examined 



DISCORBIS VESICULARIS Lamarck 



Under this name there are numbers of records from the Atlantic. 

 They are not identical so far as the figures show with the very beautiful 



M Journ. Roy. Micr. Soc, 1911, p. 331. 



