62 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



ROTAUA ROSEA d'Orbigny 



Plate 13, figures 5 a-c 



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

 No. 36. — Parker, Jones, and H. B. Brady, Ann. Mag. Nat. Hist., ser. 3, 

 vol. 16, 1865, p. 24, pi. 3, figs. 7-9.— Cushman and Kellett, Proc. U. S. 

 Nat. Mus., vol. 75, art. 25, 1929, p. 13, pi. 4, figs. 2, 3. 



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

 "Foraminiferes," 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.~ 

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

 U. S. Nat. Mus., vol. 59, 1921, p. 56, pi. 13, figs. 1-3; Publ. 311, Carnegie 

 Instit., Washington, 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, 

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

 perforate, smooth or ornamented with beadhke 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. 



This is a very common West Indian species, and seems to be 

 restricted to this region and the northern coast of South America, on 

 both the Atlantic and Pacific sides. d'Orbigny originally described 

 it from Cuba, Martinique, Guadaloupe, St. Thomas, Jamaica, and 

 Haiti. I have had it from a few Albatross stations as shown in the 

 table, and it has occurred in the Woods Hole region as very rare. It 

 occurred rarely at Porto Kico and on the north coast of Jamaica. 

 Egger records it from the region of western Australia, but his figures 

 have nothing in common with this species. The record of Heron- 

 Allen and Earland from the Kerimba Archipelago is also open to 

 much question, as it was said to resemble that of Egger's figure 

 rather than d'Orbigny's model. 



Dr. W. L. Schmitt collected it at Santa Elena, Ecuador, where it is 

 fairly common. 



In the West Indian region, it is common in shallow water, and the 

 specimens obtained in deeper water by the Albatross show polished 

 and eroded surfaces as though they had passed through the digestive 

 tract of some animal. 



There are a few other records for Rotalia from the Atlantic that 

 may be noted. 



