14 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



convolutions; all more or less visible on both sides of the shell, the 

 final whorl consisting of about 7 or 8 segments; margin entire; septa 

 marked by fine lines, without superficial depressions. Diam. 1/lOOth 

 inch (0.25 mm.)." 



"A form somewhat allied to N. depressula but differing from that 

 species in its evolute mode of growth, its even sutures and noninflated 

 segments. " 



This species was described and figured by the authors from 940 

 fathoms off the Abrohlos Bank off Brazil. Its position as a Nonion 

 seems doubtful, but it is included here for the record. 



There are several names given by Ehrenberg which it is difficult 

 to identify and which with our present knowledge can not be definitely 

 placed. 



'' Nonionina Aglajae" Ehrenberg, Abhandl. Akad. Wiss. (Berlin), 

 1872 (1873), pi. 4, fig. 3, from bottom sample from Atlantic Tele- 

 graph line, 9,600 feet in depth. 



" Nonionina Crisiae" Ehrenberg, Abhandl. Akad. Wiss. (Berlin), 

 1872 (1873), pi. 3, fig. 8, from 11,580 feet in depth. 



"Nonionina hyalina" Ehrenberg, Abhandl. Akad. Wiss. (Berlin), 

 1872 (1873), pi. 4, fig. 4, from 9,540 feet in depth. 



"Nonionina horelis" Ehernberg, Abhandl. Akad. Wiss. (Berlin), 

 1872 (1873), pi. 1, fig. 18, from Davis Strait, 6,000 feet in depth. 



" Nonionina Jloridana" Ehrenberg, Abhandl. Akad. Wiss. (Berlin), 

 1872 (1873) pi. 5, fig. 1, from bottom sample from Gulf Stream near 

 Florida, 840 feet in depth. 



"Nonionina crystallina" Ehrenberg, Die zweite deutsche Nord- 

 polarfahrt, 1874, p. 464, pi. 1, fig. 4. Arctic, Recent. 



" Nonionina Koldeweyi" Ehrenberg, Abhandl. Akad. Wiss. (Berlin), 

 1872 (1873), p. 464, pi. 1, fig. 6. Arctic, Recent. 



Leidy records as "Nonionina millepora" and " N. polygyra" 

 specimens from shore sands at Atlantic City, N. J. What these 

 actually are is not clear. 



Genus NONIONELLA Cushman, 1926 



Nonionella Cushman, Contr. Cushman Lab. Foram. Res., vol. 2, 1926, p. 64; 



Special Publ. No. 1, Cushman Lab. Foram. Res., 1928, p. 205. 

 Nonionina (part) of Authors. 



GenoTiolotype. — Nonionella miocenica Cushman. 



Test subtrochoid, the dorsal side only partially involute, ventral side 

 completely so, close coiled; chambers especially in the adult inaequi- 

 lateral, the ventral side developing a distinct elongate lobe at the 

 umbilical end, which covers the umbilicus itself; wall calcareous, 

 finely perforate; aperture at the base of the apertural face of the cham- 

 ber, low and elongate, extending from the peripheral border toward 

 the ventral side. 



Cretaceous to Recent. 



