FORAMINIFERA OF THE ATLANTIC OCEAN 75 



Genus FABULARIA Defrance, 1820 



Fabularia Defrance (Genoholotype, Fabularia discolithes Defrance), Diet. 

 Sci. Nat., vol. 16, 1820, p. 103.— Cushman, Special Publ. No. 1, Cushman 

 Lab. Foram. Res., 1928, p. 155. 



Test similar to Pyrgo but the chambers labyrinthic and the aperture 

 cribrate. 



Eocene to Miocene. 



Dillina proposed by Munier-Chalmas and Schlumberger probably 

 belongs here. 



This represents a speciahzed Tertiary development from Pyrgo, 

 but the genus became extinct and is not found in the present oceans. 



Genus FLINTIA Schubert, 1911 



Flintia Schubert (Genoholotype, SpirolocuUna robusta H. B. Brady), 

 Abhandl. k. k. Geol. Reichs., vol. 20, pt. 4, 1911, p. 124.— Cushman, Spe- 

 cial Publ. No. 1, Cushman Lab. Foram. Res., 1928, p. 155. 



SpirolocuUna (part) of Authors (not d'Orbigny). 



Test in the early stages completely involute like Biloculina, only 

 two chambers making up the exterior, later the chambers not com- 

 pletely involute, not covering the early chambers at the sides of the 

 test and in the adult spirolocuKne; wall calcareous, imperforate; aper- 

 ture with a broad, flat tooth with curved ends. 



Tertiary and Recent. 



This genus while it resembles SpirolocuUna in the adult has evi- 

 dently been derived from Biloculina by the development of open 

 coils as an adult character. 



FLINTIA ROBUSTA (H. B. Brady) 



Plate 20, Figures 1, 2 



SpirolocuUna robusta H. B. Brady, Rep. Yoy. Challenger, Zoology, vol. 9 

 1884, p. 150, pi. 9, figs. 7, 8.— Woodward, The Observer, vol. 4, 1893, p 

 76. — Chapman, Proc. Zool. Soc. London, 1895, p. 8. — Goes, Bull. Mus 

 Comp. Zool., vol. 29, 1896, p. 80.— Flint, Ann. Rep't U. S. Nat. Mus. 

 1897 (1899), p. 296, pi. 42, figs. 1, 2. — Chapman, Journ. Linn. Soc. Zool. 

 vol. 28, 1900, p. 170; vol. 30, 1910, p. 396.— Cushman, Bull. 71, U. S 

 Nat. Mus., pt. 6, 1917, p. 33; Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p 

 404, pi. 79, figs. 2 a, b. 



FlinUa robusta Schubert, Abhandl. k. k. Geol. Reichs., vol. 20, pt. 4, 1911, 

 p. 124. 



Test in the earlier stages, in the microspheric form at least, bilocu- 

 line and involute, later with newly added chambers less involute and 

 a spiroloculine development added, the whole test becoming com- 

 pressed; wall smooth except for the ridges formed by the chamber 

 edges; aperture generally circular. 



Diameter up to 1.65 mm.; thickness, 0.80 mm. 



