62 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



Genus GLOBIGERINOIDES Cushman, 1927 



GLOBIGERINOIDES CONGLOBATUS (Brady) 



Platb 25, Figure 3 



Globigerina conglobata Brady, 1884, Rep. Voy. Challenger, Zoology, vol. 9, p. 603. 



pi. 80, figs. 1-5; pi. 82, fig. 5. — Banner and Blow, I960, Contr. Cushman 



Found. Foram. Res., vol. 11, p. 6, pi. 4, fig. 4. 

 Globigerinoides conglobatus (Brady). — Bradshaw, 1959, Contr. Cushman Found. 



Foram. Res., vol. 10, p. 40, pi. 7, figs. 5, 6. 



This cosmopolitan species is well represented in the present material 

 and is found abundantly in a number of the samples. 



Globigerinoides conglobatus is characterized by the flattening of its 

 chambers, resulting in an approximately cubical shape of the test, 

 and by its deeply incised sutures, resulting in a more or less fissured 

 appearance to the test, in some instances reminiscent of the genus 

 Sphaeroidinella. The apertures of Globigerinoides conglobatus, unlike 

 those of G. ruber and G. elongatus, are low slits opening into the fissures 

 rather than high arched openings that are clearly visible from the 

 exterior. 



A few specimens (inappropriately few and almost too large to be 

 sure they are immature stages), nevertheless, are included here as 

 immature stages of G. conglobatus. They are coiled in a flat coil, and 

 the dorsal apertures, if any, are quite inconspicuous. The umbilical 

 side of the test shows a widely open umbilicus, but the aperture is 

 very small, low and slitlike, not large and arched as in Globigerina 

 bulloides. Presumably, if these can be regarded as immature stages, 

 the final chamber would have been added directly over this open 

 umbilical area, to appear flattened and beret-like on top, and with 

 several apertures around its edge. The specimens illustrated as 

 Globigerinoides sp. from Pacific plankton samples (Bradshaw, 1959, 

 p. 42, pi. 7, figs. 16, 17) seem to represent these immature, or (perhaps 

 better) incompleted, individuals of G. conglobatus. This possibility 

 was suggested by Bradshaw (idem, pp. 40, 42) in his discussion of 

 G. conglobatus. 



GLOBIGERINOIDES ELONGATUS (d'Orbigny) 



Globigerina elongata d'Orbigny, 1826, Ann. Sci. Nat., vol. 7, p. 277. — Fornasini, 

 1899, Mem. Accad. Sci. Istit. Bologna, ser. 5, vol. 7, p. 583, pi. 3, figs. 8-10. — 

 Banner and Blow, 1960, Contr. Cushman Found. Foram. Res., vol. 11, p. 12, 

 pi. 3, fig. 10. 



Globigerinoides elongata (d'Orbigny). — Cushman, 1941, Contr. Cushman Lab. 

 Foram. Res., vol. 17, p. 40, pi. 10, figs. 20-23; pi. 11, fig. 3.— Cushman, 

 Todd, and Post, 1954, U.S. Geol. Surv. Prof. Paper 260-H, p. 368, pi. 9l' 

 fig. 5. — AGIP Mineraria, 1957, Foraminiferi Padani, Milan, pi. 46, fig. 2 



A few specimens occurring together with the other planktonics are 

 placed in this species, which was described from the Adriatic Sea near 

 Rimini. 



