44 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



vol. 9, 1905, p. 226. — Sidebottom, Mem. Proc. Manchester Lit. Philos. 

 Soc, vol. 53, No. 21, 1909, p. 7, pi. 3, fig. 5. — Chapman, Subantarctic 

 Islands of New Zealand, 1909, p. 360. — Sidebottom, Mem. Proc. Man- 

 chester Lit. Philos. Soc, vol. 54, No. 16, 1910, p. 28. — Heron-Allen and 

 Earland, Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 135. — Chapman, 

 Biol. Res. Endeavour, vol. 3, pt. 1, 1915, p. 32. — Cushman, Bull. 71, U. S. 

 Nat. Mus., pt. 5, 1915, p. 51, pi. 28, fig. 4. — Heron-Allen and Earland, 

 Trans. Zool. Soc. London, vol. 20, 1915, p. 714; Journ. Roy. Micr. Soc, 1916, 

 p. 51.— Cushman, Proc. U. S. Nat. Mus., vol. 56, 1919, p. 629; Bull. 100, 

 vol. 4, 1921, p. 327, pi. 68, figs. 4a-c. — Heron-Allen and Earland, Bull. 

 Soc. Sci. Hist. Nat. Corse, 1922, p. 138; British Antarctic Exped., Zoology, 

 vol. 6, 1922, p. 214; Journ. Linn. Soc. Zool., vol. 35, 1924, p. 636; Journ. 

 Roy. Micr. Soc, 1930, p. 189. 

 Discorbina vestita Seguenza, Mem. Accad. dei Lincei, ser. 3, vol. 6, 1880, 

 p. 148, pi. 13, fig. 39. 



Test biconvex, periphery rounded, ventral side somewhat concave; 

 chambers very distinct, five to seven in the last-formed whorl, border 

 with a thickened edge joining with the limbate thickened sutures 

 leaving a central area on each chamber face thin and translucent; 

 wall finely perforate in the thin portion; aperture below the chamber 

 margin on the ventral side. 



Diameter up to 2 mm. 



This is a very distinctive and widely distributed species. It does 

 not seem to be at all common in the Western Atlantic either in the 

 West Indian region or northward. 



The thickening of the wall is very variable in relative amount, 

 some of the largest specimens being almost completely covered with 

 this secondary material. 



There are numerous fossil records but I have not attempted to 

 give the references here. 



Eponides concentrica — Material examined 



EPONIDES EXIGUA (H. B. Brady) 



Plate 10, figures 1, 2 



Pulvinulina exigua H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 696, pi. 103, figs. 13, 14. — Chapman, Proc. Zool. Soc. London, 

 1895, p. 43.— Goes, Bull. Mus. Comp. Zool., vol. 29, 1896, p. 75.— Chap- 

 man, Journ. Linn. Soc Zool., vol. 28, 1902, p. 407 (Hst); Subantarctic 

 Islands of New Zealand, 1909, p. 361; Journ. Linn. Soc. Zool., vol. 30, 



