72 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



This is a small easily overlooked species occurring in its typical 

 form rather widely distributed in the Indo-Pacific, although there 

 are records from other regions. I have in the present collections 

 very typical specimens from 12 fathoms off Levuka, Fiji, where it 

 is fairly common, and from near Nairai, Fiji. A single specimen 

 also occurred at Albatross Station H3812, 7y 2 miles south of entrance, 

 Avatoru Pass, Rahiroa Atoll, Paumotus. 



PLANISPIRINA AURICULATA Egger 



Plate 16, Figures 6 a-o 



Planispirina auriculata Eggee, Abh. kon. bay. Akad. Wiss. Miinchen, CI. II, vol. 

 18, p. 245, pi. 3, figs. 13-15, 1893. — Heron-Allen and Eart.and, Trans. Zool. 

 Soc. London, vol. 20, p. 590, pi. 46, figs. 3-7, 1915. — Sidebottom, Journ. Roy. 

 Micr. Soc, 1918, p. 10. — Cushman, Carnegie Inst. Washington Publ. 311, 

 p. 62, pi. 10, fig. 8, 1922. — Heron-Allen and Earland, Bull. Soc. Sci. Hist. 

 Nat. Corse, 1922, p. 123; Journ. Linn. Soc. Zool., vol. 35, p. 609, 1924 — 

 Cushman, U. S. Nat. Mus. Bull. 104, pt. 6, p. 93, pi. 22, fig. 3, 1929.— Cush- 

 man and Parker, Proc. U. S. Nat. Mus., vol. 80, art. 3, p. 6, pi. 2, fig. 3, 1931. 



Test minute, generally oval in outline, biconvex, consisting of a 

 few milioline chambers, the apertural end somewhat extended, turned 

 so that the aperture is entirely at one side of the test; aperture 

 elliptical or rounded, with a broad, flaring lip; sutures fairly dis- 

 tinct, not depressed; wall translucent; color, bluish white. Length, 

 0.3 mm. ; breadth, 0.15 mm. ; thickness, 0.05 mm. 



The only specimens we have are a few from Port Lotten, Kersail, 

 Caroline Islands. 



This minute species is, like the preceding, very easily overlooked on 

 account of its small size. From the records, however, it has a wide 

 distribution in both the Atlantic and Pacific. It is easily distin- 

 guished by the large aperture in proportion to the size of the test, 

 and the flaring lip. 



Genus VERTEBPvALINA d'Orbigny, 1826 



Vertebralina d'Orbigny, Ann. Sci. Nat., vol. 7, p. 283, 1S26. — H. B. Brady, Rep. 

 Voy. Challenger, Zoology, vol. 9, p. 1884. — Chapman, The Foraminifera, 

 p. 97, 1902. — Cushman, Cushman Lab. Foram. Res. Spec. Publ. No. 1, p. 

 16S, 1928 ; U. S. Nat. Mus. Bull. 104, pt. 6, p. 95, 1929. 



Genoholotype. — Vertebralina striata d'Orbigny. 



Test with the early chambers planispiral, later ones in a rectilinear 

 series ; aperture simple, a long narrow slit either at the outer end of 

 the chamber or somewhat laterally placed, typically with a definite 

 lip. Eocene to Recent. 



In the present collection the genus is represented only by the fol- 

 lowing species, striata. 



