96 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



VERTEBRALINA CASSIS d'Orbieny 



Plate 22, Figures 4 a, b 



Vertebralina cassis d' Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba. 

 1839, "ForaminifSres," p. 51, pi. 7, figs. 14, 15.— Cushman. Proc. IT. S. 

 Nat. Mus., vol. 59, 1921, p. 64, pi. 15, figs. 1, 4 (not 2, 3, 5-8): Publ. 811, 

 Carnegie Instit. Washington, 1922, p. 262. 



Test compressed, for the most part planispiral; periphery of each 

 chamber with a broad, thin keel, two to three chambers in the last- 

 formed coil, the main body of each chamber with numerous, somewhat 

 oblique costae, the last-formed chamber often projecting beyond the 

 periphery of the preceding coil, but carinate, like the earlier ones; 

 ■aperture elongate, with a distinct, everted lip; early chambers, where 

 visible, spirolocuHne. 



Length, 1.10 mm.; breadth, 1 mm,; thickness, 0.15 mm. 



This species is common in the warm shallow waters of the West 

 Indian region but seems to be largely limited to this region. It is a 

 beautifully ornamented species. The early chambers become some- 

 what involute, obscuring the stages of the early development. 



VERTEBRALINA CASSIS d 'Orbigny, var. MUCRONATA d'Orbigny 



Plate 22, Figure 5 



Vertebralina mucronata d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. 



Cuba, 1839, " Foraminiferes," p. 72, pi. 7, figs. 16-19; Foram. Foss. Vienne, 



1846, p. 120, pi. 21, figs. 18, 19.— Ctjshman, Proc. U. S. Nat. Mus., vol. 59, 



1921, p. 64, pi. 15, figs. 2, 3, 5-8 (not 1, 4). 

 Vertebralina cassis d'Orbigny, var. mucronata Cushman, Publ. 311, Carnegie 



Instit. Washington, 1922, p. 63; Publ. 344, 1926, p. 81. 



Test of the early portion close-coiled, usually without a carina, the 

 uncoiled portion consisting in the adult usually of two chambers, 

 compressed, the last one much broader than the preceding, the 

 apertural end with an everted lip extending back on both sides to a 

 recurved projection ; surface ornamented with numerous raised costae, 

 somewhat shiny; color white. 



This nonkeeled, less expanded variety occurs usually with the 

 typical form. 



VERTEBRALINA STRIATA d'Orbigny 



Plate 22, Figures 6 a, 6 



Vertebralina striata d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 283, No. 1. 

 Modeles, No. 81. — Williamson, Rec. Foram. Gt. Britain, 1858, p. 90, pi. 

 7, figs. 196 a, b ( = 197, 198). — W. B. Carpenter, Parker, and Jones, 

 Introd. Foram., 1862, p. 72, pi. 5, figs. 17-25. — Parker, Jones, and H. B. 

 Brady, Ann. Mag. Nat. Hist., ser. 3, vol. 16, 1865, p, 32, pi. 1, fig. 1; ser. 

 4, vol. 8, 1871, p. 239, pi. 8, fig. 27.— Schwager, Boll. Comm. Geol. Ital., 

 vol. 8, 1877, p. 27, pi., fig. 106. — H, B. Brady, Rep. Voy, Challenger, Zool- 

 ogy, vol. 9, 1884, p. 187, pi. 12, figs. 14-16.— A. Silvestri, Atti Accad. 

 Sci. Acireale, vol. 7, 1896, p. 22. — Millett, Journ. Roy. Micr. Soc, 1898, 

 p. 607, pi. 13, fig. 1. — SiDEBOTTOM, Mem. Proc. Manchester Lit. Philos. 



