66 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



Hastigerinella digitata (Brady). — Cushman, Todd, and Post, 1954, U.S. Geol. 



Surv. Prof. Paper 260-H, p. 369, pi. 91, figs. 9, 10. 

 Globigerinella sp. — Bradshaw, 1959, Contr. Cushman Found. Foram. Res., vol. 



10, pt. 2, p. 38, pi. 7, figs. 3, 4. 



This species is found rarely at a few of the deep-water stations. 

 It seems related to Globigerinella aequilateralis in its planispiral coiling 

 but is distinguished by the radial elongation of chambers, becoming 

 progressively greater as the chambers are added, so that the final 

 several chambers may be as much as three times as long as wide and 

 in some instances may be pointed at their outer ends. 



Genus GLOBIGERINITA Bronnimann, 1951 



GLOBIGERINITA GLUTINATA (Egger) 



Globigerina glutinata Egger, 1893, Abhandl. Akad. Wiss. Miinchen, Math.- 

 naturhist. Abt., CI. 2, vol. 18, p. 371, pi. 13, figs. 19-21.— Rhumbler, 1911, 

 Ergebnisse Plankton-Exped. Humboldt-Stiftung, vol. 3, p. 148-149, pi. 

 29, figs. 14-26. 



Globigerinita glutinata (Egger). — Phleger, Parker, and Peirson, 1953, Rep. 

 Swedish Deep-Sea Exped., vol. 7, Sediment Cores, no. 1, p. 16, pi. 2, figs. 

 12-15. — Bradshaw, 1959, Contr. Cushman Found. Foram. Res., vol. 10, 

 p. 40, pi. 7, figs. 7, 8. 



A more complete synonymy may be found in Todd (1964, U.S. 

 Geol. Surv. Prof. Paper 260-CC, p. 1085). 



Rare specimens of this well-known and widely distributed species 

 are found in a few of the samples. The species is distinguished by 

 its more finely spinose wall, low-arched apertural openings, and 

 smaller-than-average size for planktonic Foraminifera. 



GLOBIGERINITA HUMILIS (Brady) 



Plate 25, Figures 1, 2 



Truncatulina humilis Brady, 1884, Rep. Voy. Challenger, Zoology, vol. 9, p. 665, 



pi. 94, fig. 7. 

 Valvulineria cf. humilis (H. B. Brady). — Phleger and Parker, 1951, Geol. Soc. 



Amer. Mem. 46, pt. 2, p. 25, pi. 13, figs. 9, 10. 

 Valvulineria humilis (H. B. Brady). — Phleger, Parker, and Peirson, 1953, 



Rep. Swedish Deep-Sea Exped., vol. 7, Sediment Cores, no. 1, p. 40, pi. 8, 



figs. 31, 32. 

 Globigerina lamellosa Terquem. — Rhumbler, 1911, Ergebnisse Plankton-Exped. 



Humboldt-Stiftung, vol. 3, p. 149, pi. 30, figs. 1-6. 

 Globigerinita parkerae Loeblich and Tappan, 1957, Journ. Washington Acad. 



Sci., vol. 47, no. 4, p. 113, text fig. 1. 



This minute species (greater dimension about 0.2 mm.) appears to 

 be a cosmopolitan species in the deeper water of the oceans. Probably 

 overlooked often because of its small size, it is found in most of the 

 present samples and is abundant in many of them. 



Number of chambers per final whorl is 6 or 7 (rarely 8), and the 

 periphery is either smooth or slightly lobulated toward the last-formed 



