36 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



Candeina nitida — material examvied. 



Genus SPHAEROIDINA D'Orbigny, 1826. 



Sphaeroidina D'Orbingy (type, S. hulloides D'Orbigny), Ann. Sci. Nat., 

 vol. 7, 1826, p. 267.— H. B. Brady, Rep. Voy. Challenger, Zoology, 

 vol. 9, 1884, p. 619.— Chapman, The Foraminifera, 1902, p. 208.— 

 CusHMAN, Bull. 71, U. S. Nat. Mas., pt. 4, 1914, p. 17. 



Description. — Test composed of a few chambers arranged in an 

 irregular spire, the later chambers especially much inflated, increas- 

 ing rapidly in size and embracing, a few only visible from the ex- 

 terior; wall perforate; aperture an arched opening at or near the inner 

 margin of. the chamber, often with a calcareous, toothlike process 

 'partially closing the opening. 



According to Chapman, the genus ranges back to the Cretaceous, 

 but in the Tertiary it becomes more abundant. 



The two common recent species are very unlike. 



SPHAEROIDINA BULLOIDES D'Orbigny. 



Plate 7, figs. 1-6. 



Sphaeroidina hulloides D'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 267, No. 1; 

 Modeles, No. 65. — Parker, Jones, and B. H. Brady, Ann. Mag. Nat. 

 Hist., ser. 3, vol. 16, 1865, p. 29, pi. 2, fig. 58.— Goes, Kongl. Svensk. 

 Vet. Akad. Handl., vol. 19, 1882, p. 89, pi. 60, figs. 190-193.— H. B. 

 Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 620, pi. 84, figs. 

 1-7; Journ. Roy. Micr. Soc, 1887, p. 917. — H. B. Brady, Parker, and 

 Jones, Trans. Zool. Soc. London, vol. 12, 1888, p. 226, pi. 45, figs. 



