86 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



earlier chambers somewhat hidden by a later covering of shell material, 

 umbilical area fdled by shell material with fine tubules, the exterior 

 standing out as a rounded boss. 

 Eocene. 



Genus TRETOMPHALUS Moebius, 1880 



Tretomphalus Moebitjs, Foram. Insel Mauritius, 1880, p. 98. — Cushman, 



Special Publ. No. 1, Cushman Lab. Foram, Res., 1928, p. 288. 

 Rosalina (part) d'Orbigny, 1839. 

 Cymbalopora (part) of Authors (not Hagenow). 



Genoholotype. — Rosalina hulloides d'Orbigny. 



Test free, early stages Discorhis-Xiko, in a flattened trochoid arrange- 

 ment, later in some forms like Cymhalojpora with alternating series of 

 annular chambers; wall calcareous, perforate; in the adult developing 

 a large semiglobular ''float chamber," an interior, entirely globular 

 or lobed cliamber with a valve-like opening inside the outer wall 

 which is provided with numerous large rounded pores on the outer 

 face, the test at this stage becoming pelagic. 



Recent. 



THETOMPHALUS BULLOIDES (d'Orbigny) 



Plate 16, figures 5 a-c 



Rosalina hulloides d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 

 1839, "Foraminiferes," p. 104, pi. 3, figs. 2-5. 



Cymbalopora hulloides Carpenter, Parker, and Jones, Introd. Foram., 

 1862, p. 216.— H. B. Brady, Quart. Journ. Micr. Soc, vol. 19, 1879, p. 80; 

 Rep. Voy Challenger, Zoology, vol. 9, 1884, p. 638, pi. 102, figs. 7-12, text 

 figs. 20 a-c. — Eggbr, Abhandl. kon. bay. Akad. Wiss. Miinchen, Cl. II, 

 vol. 18, 1893, p. 381, pi. 18, fig. 53. — Woodward, The Observer, vol. 4, 

 1893, p. 176. — Chapman, Proc. Zool. Soc. London, 1895, p. 39. — Murray, 

 Nat. Sci., vol. 11, 1897, p. 20, fig. 3 (in text). — Chapman, Journ. Linn. Soc. 

 London, Zoology, vol. 28, 1902, pp. 189, 208, 405. — Earland, Journ. 

 Quekett Micr. Club, ser. 2, vol. 8, 1902, p. 309, pi. 16, figs. 6-9.— Rhum- 

 BLER, Zool. Jahrb., Abt. Syst., vol. 24, 1906, p. 72. — Sidebottom, Mem. 

 Proc. Manchester Lit. Philos. Soc, vol. 52, No. 13, 1908, p. 10. — Pearcey, 

 Trans. Roy. Soc. Edinburgh, vol. 49, 1914, p. 1040. — Heron-Allen and 

 Earland, Trans. Zool. Soc. London, vol. 20, 1915, p. 688.— Heron- 

 Allen, Philos. Trans., vol. 206, 1915, p. 252; ct seq., pis. 16, 17 (part).— 

 Heron-Allen and Earland, British Antarctic Exped., Zoology, vol. 6, 

 1922, p. 199. 



Tretomphalus hulloides Moebius, Beitr. Meeresfauna Insel Mauritius, 1880, 

 p. 98, pi. 10, figs. 6-9.— Cushman, Bull. 71, U. S. Nat. Mus., pt. 5, 1915, 

 p. 26, pi. 14, figs. 3, 4, fig. 29 (in text); Proc. U. S. Nat. Mus., vol. 59, 

 1921, p. 58, pi. 13, fig. 13; Publ. 311, Carnegie Instit., Washington, 1922, 

 p. 42, figs. 2, 3 (in text); Publ. 342, 1924, p. 36, pi. 11, figs. 1-3.— Cushman 

 and WiCKENDEN, Proc. U. S. Nat. Mus., vol. 75, art. 9, 1929, p. 12, pi. 5, 

 figs. 2-4. — Cushman and Kellett, Proc. U. S. Nat. Mus., vol. 75, art. 25, 

 1929, p. 13. 



Discorbina hulloides Goics, Kongl. Svensk. Vet. Akad. Handl., vol. 19, 1882, 

 p. 106, pi. 8, figs. 262, 263. 



