110 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



Genus PLANULINA d'Orbigny, 1826 



PlanuUna d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 280. — Cttshman, 



Special Publ. No. 1, Cushman Lab. Foram. Rea., 1928, p. 318. 

 Anomalina (part) of Authors. 

 Truncaiulina (part) of Authors. 



Genotype, by designation. — PlanuUna ariminensis d'Orbigny. 



Test in the young trochoid, in the adult very much compressed, 

 «volute, the earlier chambers visible from both sides of the test in the 

 megalospheric form, in the microspheric form with the central area 

 raised on the dorsal side; wall calcareous, coarsely perforate; aperture 

 at the base of the chamber at the median line. 



Cretaceous to Recent. 



PLANUUNA ARIMINENSIS d'Orbigny 



PlanuUna ariminensis d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 280, pi. 5, 



figs. 1-3 bis; Modules No. 49. — Cushman, Contr. Cushman Lab. Foram. 



Res., vol. 5, 1929, p. 102, pi. 15, figs. 3, 4. 

 Planorbidina ariminensis Parker, Jones, and H. B. Brady, Ann. Mag. 



Nat. Hist., ser. 3, vol. 16, 1865, p. 26, pi. 3, fig. 78. 

 Anomalina ariminensis H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 



1884, p. 674, pi. 93, figs. 10, 11. 



Test generally planispiral, somewhat evolute on both sides, very 

 much compressed, periphery truncate, sides of the test flattened and 

 nearly parallel, with a very slight umbo on the ventral side; chambers 

 distinct, narrow and strongly curved; sutures distinct, strongly 

 limbate; wall coarsely perforate, the sutures and umbonate portion 

 on the ventral side often papillate; aperture at the periphery and 

 extending over on the dorsal side along the inner border of the chamber. 



Length up to about 1 mm.; thickness 0.15 mm. 



Brady's figures in the Challenger Report of specimens from South- 

 east of Pernambuco, Brazil, are very typical. He also records the 

 species from the North Atlantic, 150 to 1,600 fathoms, and from the 

 South Atlantic, 350 and 2,200 fathoms. In the Albatross material, 

 the species does not seem to be present in the western Atlantic. 



PLANUUNA WUELLERSTORFI (Schwager) (?) 



Plate 19, figures 5, 6 



Anomalina wuellerstorfi Schwager, Novara-'Exped., Geol. Theil., vol. 2, 



1866, p. 258, pi. 7, figs. 105, 107. 

 Truncaiulina wuellerstorfi H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 



1884, p. 662, pi. 93, figs. 8, 9. 

 PlanuUna wuellerstorfi Cushman, Contr. Cushman Lab. Foram. Res., vol. 5, 



1929, p. 104, pi. 15, figs. 1, 2. 



Test much compressed, early stages trochoid later ones somewhat 

 spread out, periphery rounded, ventral side somewhat convex or at 



