b PROCEEDINGS OF THE NATIONAL MUSEUM vol. 75 



NOMONELLA CHILIENSIS, new species 



Plate 2, figures 4 a-c 



Test asymmetrical, trochoid, the spire very much flattened, consist- 

 ing of about 2^ whorls, periphery subacute, umbilicus depressed; 

 chambers numerous, 10-12 in the last-formed whorl, low and broad, 

 not inflated; sutures distinct, not depressed, strongly limbate, on the 

 dorsal side oblique, ventrally strongly curved; wall smooth, polished, 

 very finely perforate; aperture low, elongate, at the margin of the 

 chamber extending from the periphery ventrally. 



Maximum height, 0.40 mm.; breadth, 0.35 mm.; thickness, 0.18 

 mm. 



Holotype.—{C&t. No. 20785, U.S.N.M.). From off Corral, Chile. 

 It also occurs in material from Lota, Chile. 



At first glance this might not be thought to be a Nonionella, but 

 the general characters of the test are much like the others noted 

 except for the greater amount of asymmetry and the limbate sutures. 



Genus ELPHIDIUM Montfort, 1808 



ELPHIDIUM ALVAREZIANA (d'Orbigny) 



Plate 2, figures 5 a, b 



Polystomella alvareziana d'Orbigny, Voy. Am6r. Merid., 1839, vol. 5, pt. 5 

 " Foraminif^res," p. 31. pi. 3, figs. 11, 12, 



There are a very few specimens from the coast of Chile off Lota 

 and Corral that are very close to this species described from d'Orbigny 

 from the Falklands and the coast of Argentina. The number of 

 chambers, the general shape and character of the retral processes and 

 of the umbilical region are similar to the figure given by d'Orbigny. 

 Our specimens are somewhat thicker in peripheral view. 



Diameter, 0.45 mm.; thickness, 0.20 mm. 



Family BULIMINIDAE 



Genus BULIMINELLA Cushman, 1911 



BULIMINELLA ELEGANTISSIMA (d'Orbigny) 



Plate 3, figures 1-3 



Bulimina elegantissima d'Orbigny, Yoy. Am6r. Merid., 1839, vol. 5, No. 5, "Fo- 



raminiferes," p. 51, pi. 7, figs. 13, 14. — Schlumberger, Feuille Jeun. Nat., 



vol. 12, 1881, pi. 1, fig. 14. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 



9, 1884, p. 402, pi. 50, figs. 20-22.— Sidebottom, Mem. Proc. Manchester Lit. 



Philos. Soc, vol. 49, No. 5, 1905, p. U, pi. 2, fig. 6.— Chapman, Rep't. Foram. 



Subantarctic Ids., New Zealand, 1909, p. 330; Biol. Res. Endeavour, vol. 



3, pt. 1, 1915, p. 18.— Sidebottom, Journ. Roy. Micr. Soc, 1918, p. 122.— 



Heron-Allen and Earland, British Antarctic Exped., Zool., vol. 6, 1922, 



p. 129. 

 Buliminella elegantissima Cushman, Bull. 71, U. S. Nat. Mus., pt. 2, 1911, p. 89; 



Proc. U. S. Nat. Mus., vol. 56, 1919, p. 606; Contr. Cushman Lab Foram. 



Res., vol. 1, pt. 2, 1925, p. 40, pi. 6, figs. 5 a, b. 



