18 BULLETIN 11, UNITED STATES NATIONAL MUSEUM. 



SP&2EROIDINA BULLOIDES d'Orbigny. 



Plate 10, fig. 7; plate 12, fig. 1. 



Sphaeroidina bulloides d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 267, No. 1; 

 Modeles, No. 65. — Parker, Jones, and H. B. Brady, Ann. Mag. Nat. Hist., 

 eer. 3, vol. 16, 1865, p. 29, pi. 2, fig. 58.— Goes, Kongl. Svensk. Vet. Akad. 

 Handl., vol. 19, 1882, p. 89, pi. 60, figs. 190-193.— H. B. Brady, Rep. Voy. 

 Challenger, Zoology, vol. 9, 1884, p. 620, pi. 84, figs. 1-7.— H. B. Brady, 

 Parker, and Jones, Trans. Zool. Soc, vol. 12, 1888, p. 226, pi. 45, figs. 

 9-11. — Burrows, Sherborn, and Bailey, Journ. Roy. Micr. Soc, 1890, 

 p. 562, pi. 11, figs. 20, 21. — Fornasini, Mem. Accad. Sci. 1st. Bologna, ser. 

 5, vol. 3, 1893, p. 430, pi. 2, fig. 13.— Egger, Abh. kon. bay. Akad. Wiss. 

 Munchen, CI. n, vol. 18, 1893, p. 375, pi. 13, figs. 48, 49.— Goes, Kongl. 

 Svensk. Vet. Akad. Handl., vol. 25, 1894, p. 87, pi. 14, fig. 770; Bull. Mus. 

 Comp. Zool., vol. 29, 1896, p. 67.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), 

 p. 325, pi. 71, fig. 1.— Millett, Journ. Roy. Micr. Soc, 1903, p. 692.— Bagg, 

 Proc U. S. Nat. Mus., vol. 34, 1908, p. 155. — Sidebottom, Mem. and Proc 

 Manchester Lit. and Philos. Soc, vol. 52, No. 13, 1908, p. 5, pi. 1, fig. 11. 



Description. — Test nearly spherical, composed of a few much 

 inflated chambers, arranged in a spire of but about two revolutions, 

 only those of the last formed revolution being visible from the 

 exterior in most specimens; wall smooth and polished, thick, min- 

 utely perforate; aperture an arched, semicircular opening, usually 

 nearly closed by a broad flat semicircular tooth. 



Diameter on an average about 1 mm. 



Distribution. — Brady records this species from four Challenger 

 stations in the North Pacific in from 1,850 to 2,300 fathoms. Goes 

 records it from the western Pacific, Albatross D 3407 in 885 fathoms 

 and D 3376 in 1,132 fathoms. Bagg records it from four Albatross 

 stations off the Hawaiian Islands, with depths ranging from 572 to 

 1,398 fathoms. 



In the North Pacific material I have examined the species has 

 occurred at many stations, in the region about the Hawaiian Islands 

 and through the various Nero soundings as well as off Japan. The 

 depths of the stations have as a rule been more than 1,000 fathoms, 

 the shallowest being 859 and the deepest 2,067 fathoms. 



Occasionally specimens are met with which in the final revolution 

 have failed to entirely cover the earlier chambers and the beginning 

 of the spiral development is visible. At first glance this species 

 appears like an imperforate foraminifer the perforations being very 

 fine and indistinct and the wall white and highly polished. In almost 

 all its characters it is in great contrast with the species following. 



