6 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



Hist. Survey Minnesota, vol. 3, 1893, p. 40, pi. d, figs. 14-17. — Egger, Abh. 

 kon. bay. Akad. Wiss. Munchen, 01. n, vol. 18, 1893, p. 362, pi. 13, figs. 1-3.— 

 Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 25, 1894, p. 83, pi. 14, figs. 

 754-760. — Silvestri, Mem. Pont. Accad. Nuovi Lincei, vol. 15, 1899, p. 245, 

 pi. 4, figs. 7-9. — Fornasini, Mem. Accad. Sci. 1st. Bologna, ser. 5, vol. 7, 



1899, p. 579, pi. 1, fig. 4.— Flint, Ann. Rep. U. S. Nat. Mus., 1897 (1899). 

 p. 321, pi. 69, fig. 2.— Rhumbler, in Brandt, Nordisches Plankton, Heft. 14, 



1900, p. 21, figs. 24-26.— Millett, Journ. Roy. Micr. Soc, 1903, p. 685.— 

 Bagg, Bull. IT. S. Geol. Surv., No. 268, 1905, p. 41, pi. 7, fig. 7; Proc. TJ. S. 

 Nat. Mus., vol. 34, 1908, p. 153. — Sidebottom, Mem. and Proc. Manchester 

 Lit. and Philos. Soc, vol. 52, No. 13, 1908, p. 3; vol. 54, No. 16, 1910, p. 23.— 

 Bagg, Bull. IT. S. Geol. Surv., No. 513, 1912, p. 77, pi. 23, figs. 2S. 



Description. — Test subglobose, spiral, composed of few chambers, 

 inflated, subspherical, all visible from above, three to four visible 

 from below, umbilicate, sutures deep; surface reticulate, with spines 

 when in a perfect state of preservation; aperture from each chamber, 

 large, opening into a central umbilical depression. 



Diameter, 0.30-0.80 mm. 



Distribution. — Brady speaks of this species in the Challenger Report 

 as found "wherever Foraminifera have been collected." Bagg records 

 it at each of the nineteen stations from which he had material, off 

 the Hawaiian Islands. I have records of its occurrence at more than 

 a hundred Nero stations between Guam and Yokohama and then 

 stopped recording as it was found at nearly every station where any 

 Globigerina types occurred. Some of the records are as shallow as 

 55 fathoms, near the Hawaiian Islands and from that it occurred at 

 stations down to 2,543 fathoms. 



The variety triloba Reuss occurs with the typical nearly everywhere 

 but seems much less common. 



GLOBIGERINA DUBIA Egger. 



Plate 4, figs. 1-3. 



Globigerina dubia Egger, Neues Jahrb. fur Min., 1857, p. 281, pi. 9, figs. 7-9. — 

 H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 1879, p. 71; Rep. Voy. Chal- 

 lenger, Zoology, vol. 9, 1884, p. 595, pi. 79, figs. 17a-c. — Egger, Abh. kon. 

 bay. Akad. Wiss. Munchen, CI. n, vol. 18, 1893, p. 366, pi. 13, figs. 36-38, 

 77.— Flint, Ann. Rep. U. S. Nat. Mus., 1897 (1899), p. 322, pi. 69, fig. 4 — 

 Rhumbler, in Brandt, Nordisches Plankton, Heft. 14, 1900, p. 19, fig. 20. — 

 Millett, Journ. Roy. Micr. Soc, 1903, p. 686. — Bagg, Proc. U. S. Nat. Mus., 

 vol. 34, 1908, p. 154; Bull. U. S. Geol. Surv., No. 513, 1912, p. 79, pi. 22, 

 figs. 4a-d. 



Description. — Test composed of numerous inflated chambers ar- 

 ranged in a nautiloid spiral, chambers all visible from above, umbili- 

 cate below, with only the chambers of the last volution visible, 

 usually 5 to 6 in number; wall reticulate; apertures of the chambers 

 opening into the umbilical cavity. 



Diameter, 0.50-0.80 mm. 



