ART. 25 FORAMINIFERA — CUSHMAN AND KELLETT 13 



ROTALIA ROSEA d'Orbigny 



Plate 5, figures 2, 3 



Rotalia rosea d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 272, No. 7; Mod61es No. 

 36. — Parker, Jones, and H. B. Brady, Ann. Mag. Nat. Hist., ser. 3, vol 

 16, 1865, p. 24, pi. 3, figs. 7-9. 



Rotalina rosea d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, " For- 

 aminiferes," p. 72, pi. 3, figs. 9-11. 



Truncatulina rosea H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9,1884, p 

 667, pi. 96, fig. 1.— Flint, Ann. Rep't U. S. Nat. Mus., 1897 (1899), p. 334 

 pi. 78, fig. 2; Bull. U. S. Fish Commission No. 484, 1900, p. 416.— Cush.man 

 Proc. Boston Soc. Nat. Hist., vol. 34, No. 2, 1908, p. 30; Carnegie Instit 

 Washington, Publ. 213, 1918, p. 284; Proc. U. S. Nat. Mus.. vol. 59, 1921 

 p. 56, pi. 13, figs. 1-3; Publ. 311, Carnegie Instit., 1922, p. 46, pi. 14, figs 

 3-5; Publ. 344, 1925, p. 78. 



Test trochoid, biconvex, the dorsal side often with a high spire, 

 periphery acute, or with small spinose projections or with irregular 

 plate-like extensions at each chamber, umbilical area with a distinct 

 plug; chambers usually 9 to 10 in the last-formed whorl, increasing 

 gradually in size as added, not inflated; sutures limbate but not 

 raised, oblique on the dorsal side, nearly radial on the ventral side, 

 jQush on the dorsal side, depressed on the ventral side; wall coarsely 

 perforate, smooth or ornamented with bead-like projections, especially 

 near the periphery; aperture, an elongate slit at the inner margin 

 of the ventral side of the chamber, with a considerable lip developed 

 above it, color rose-red to reddish brown. 



Diameter averaging about 0.40 mm. 



The only station for this species in the material is Santa Elena, 

 Ecuador, where it was fairly common. It shows the various forms 

 that it develops in the West Indian region and the record is inter- 

 esting as showing the occurrence of a typical restricted West Indian 

 species on the Pacific side of America. Evidently this tropical fauna 

 extends about as far south as the great western angle of South 

 America after w^hich it gives way to a colder-water fauna extending 

 far to the south. 



Family CYMBALOPORETTIDAE 



Genus TRETOMPHALUS Moebius, 1880 



TRETOMPHALUS BULLOIDES (d'Orbigny) 



Rotalina bvlloides d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, 



" Forarainiferes," p. 104, pi. 3, figs. 2-5. 

 Cymbalopora bulloides Carpenter, Parker, and Jones, Introd. Foram., 1862, 



p. 216. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 638, 



pi. 102, figs. 7-12; text figs. 20 a-c. 

 Tretomphalus bulloides Moebius, Beitr. Meeresfauna Insel Mauritius, 1880, p. 



98, nl. 10, figs. 6-9.— CusHMAN, Publ. 311, Carnegie Instit. Washington, 



192"5, p. 42, text figs. 2, 3; Publ. 342, 1924, p. 36, pi. 11, figs. 1-3.— 



