72 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



Subfamily 6. Baggininae 



Test generally biconvex, the umbilical area closed, the area adjacent 



to it on each chamber with a thinner, rounded, clear area, usually 



without perforations; aperture at the base of the ventral margin of 



the chamber. 



Genus CANCRIS Montfort, 1808 



Cancris Montfort, Conch. Syst., vol. 1, 1808, p. 267. — Cushman, Special 



Publ. No. 1, Cushman Lab. Foram. Res., 1928, p. 279. 

 Nautilus (part) Fichtel and Moll, 1798 (not Linnaeus). 

 Roialina (part) Williamson, 1858 (not d'Orbigny). 

 Pulvinulina (part) of Authors. 



Genoholotype. — Nautilus auriculus Fichtel and Moll. 



Test trochoid, nearly equally biconvex, compressed; chambers few, 

 rapidly enlarging as added; wall calcareous, perforate; umbilical area 

 with a clear plate of rather large dimensions for the size of the test; 

 aperture narrow, on the inner border of the ventral side of the last- 

 formed chamber. 



Tertiary and Recent. 



Species of this genus occur abundantly on both sides of the Atlantic, 

 and are distinctive. 



CANCRIS AURICULA (Fichtel and Moll) 



Plate 15, figures 1 a-c 



Nautilus auricula, var. a, Fichtel and Moll, Test. Micr., 1803, p. 108, 

 pi. 20, figs, a-c; var. /3, pi. 20, figs. d-f. 



Pulvinulina auricula Parker and Jones, Philos. Trans., vol. 155, 1865, 

 p. 393.— H. B. Brady, Trans. Linn. Soc. ZooL, vol. 24, 1864, p. 474.— 

 Jones, Parker, and H. B. Brady, Foram. Crag, 1866, pi. 2, figs. 33-35. — 

 Parker, Jones, and H. B. Brady, Ann. Mag. Nat. Hist., ser. 4, vol. 8, 

 1871, p. 173, pi. 12, fig. 143. — Broeck, Bull. Soc. Etude Sci. Nat. Nimes, 6 

 Anne, 1878, p. 20. — Terrigi, Atti Accad. Pont. Nuovi Lincei, vol. 33, 

 1880, p. 206, pi. 3, fig. 58. — Goiss, Kongl. Svensk. Vet. Akad. Handl., 

 vol. 19, No. 4, 1882, p. 109, pi. 8, figs. 273-275.— Terrigi, Atti Accad. 

 Pont. Nuovi, vol. 35, 1883, p. 199.— H. B. Brady, Rep. Voy. Challenger, 

 Zoology, vol. 9, 1884, p. 688, pi. 106, figs. 5a-c. — Balkwill and Wright, 

 Trans. Roy. Irish Acad., vol. 28, Sci., 1885, p. 351. — Siddall, Proc. Lit. 

 Phil. Soc. Liverpool, 1886, p. 71. — Malagoli, Atti Soc. Nat. Modena 

 (Rend), ser. 3, vol. 3, 1887, p. 110, pi. 1, fig. 16.— Halkyard, Trans. 

 Manchester Micr. Soc, 1889, p. 70. — Howchin, Trans. Proc. Roy. 

 Soc. So. Australia, vol. 12, 1889, p. 14. — Terrigi, Mem. R. Accad. Lincei, 

 ser. 4, vol. 6, 1889, p. 119, pi. 9, fig. 2.— Wright, Proc. Roy. Irish Acad., 

 ser. 3, vol. 1, 1891, p. 491. — Chaster, First Rep't. Southport Soc. Nat. 

 Sci., 1890-91 (1892), p. 66. — Egger, Abhandl. kon. bay. Akad. Wiss. 

 Munchen, CI. II, vol. 18, 1893, p. 415, pi. 17, figs. 26-28.— Woodward, 

 The Observer, vol. 4, 1893, p. 177.— Goes, Kongl. Svensk. Vet. Akad. 

 Handl., vol. 25, No. 9, 1894, p. 98, pi. 16, figs. 809, 810.— Amicis, Nat. 

 Sicil., Ann. 14, 1895, p. 119. — Chapman, Proc. Zool. Soc. London, 

 1895, p. 43.— Jones, Foram. Crag, pt. 4, 1897, p. 320, pi. 2, figs. 33-35.— 



