22 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



This species is only known from the Tortugas region where it is 

 fairly common, occurring at several stations. It also occurs in 

 material from Montego Bay, Jamaica, and is probably widely dis- 

 tributed in the West Indian region. The specimens have a beautiful 

 brown color with a translucent wall. The umbilical ends of the 

 chambers are very clear and transparent. 



DISCORBIS GLOBULARIS (d'Orbigny) 



Plate 4, figures 9 a-c 



Rosalina globularis d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 271, pi. 13, 

 figs. 1, 2, Modeles, No. 69. 



Discorbina globularis Carpenter, Parker, and Jones, Introd. Foram., 

 1S62, p. 204, pi. 3, fig. 1. — H. B. Brady, Trans. Linn. See. Zool., vol. 24, 

 1864, p. 473 (table); Nat. Hist. Trans. Northumberland and Durham, 

 vol. 1, 1865 (1867), p. 104; Ann. Mag. Nat. Hist., ser. 4, vol. 6, 1870, 

 p. 64; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 643, pi. 86, figs. 8, 

 13. — Balkwill and Wright, Trans. Roy. Irish Acad., vol. 28, Sci., 1885, 

 p. 349. — SiDDALL, Proc. Lit. Phil. Soc. Liverpool, 1886, p. 70 (list). — 

 Halkyard, Trans. Manchester Micr. Soc, 1889, p. 69. — Chaster, First 

 Rept. Southport Soc. Nat. Sci., 1890-91 (1892), p. 65.— Wright, Proc. 

 Roy. Irish Acad., ser. 3, vol. 1, 1891, p. 489. — Woodward, The Observer, 

 vol. 4, 1893, p. 176. — Egger, Abhandl. kon. bay. Akad. Wiss. Miinchen, 

 CI. II, vol. 18, 1893, pi. 15, figs. 7-9. — Goiis, Kongl. Svensk. Vet. Akad. 

 Handl., vol. 25, No. 9, 1894, p. 94, pi. 15, fig. 793.— Mills, Trans. Hull. 

 Sci. Field Nat. Club, vol. 1, 1900, p. 150, pi. 11, fig. 34.— Wright, Irish 

 Nat., 1900, p. 55. — Kiaer, Rept. Norwegian Fish, and Mar. Invest., 

 vol. 1, No. 7, 1900, p. 45. — Earland, Journ. Quekett Micr. Club, ser. 2, 

 vol. 9, 1905, p. 220. — Millett, Rec. Foram. Galway, 1908, p. 6. — Heron- 

 Allen and Earland, Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 126; 

 Trans. Linn. Soc. London, ser. 2, vol. 11, 1916, p. 272; Journ. Roy. Micr. 

 Soc, 1916, p. 50. 



Discorbina turbo, var. globularis Parker and Jones, in Carpenter, Introd. 

 Foram., 1862, Appendix, p. 311. 



Discorbina turbo, var. vesicularis, subvar. globularis Parker and Jones, 

 Philos. Trans., vol. 155, 1865, p. 386, pi. 14, figs. 22, 23. 



Test compressed, plano-convex, dorsal side slightly convex, ventral 

 side flattened or slightly concave, periphery rounded; chambers dis- 

 tinct, usually five in the last-formed whorl, gradually and uniformly 

 increasing in size as added, somewhat overlapping on the ventral side; 

 sutures distinct, slightly depressed, gently curved; wall coarsely per- 

 forate on the dorsal side, finely so on the ventral; aperture narrow 

 toward the umbilicus beneath the somewhat extended portion of the 

 inner end of the chamber. 



Diameter up to 0.85 mm. 



This is a common species especially about the British Isles and 

 western Europe, and there are many records as noted above. There 

 are comparatively few records from other regions, and they are not 



