FORAMINIFERA OF THE ATLANTIC OCEAN. 89 



CLAVULINA OBSCURA Chaster. 



Plate 16, fig. 6. 



Verneuilina polystropha (Reuss) ''dimorphous form" J. Wright, Rep. Belfast 



Nat. P'ield Club, 1886, Appendix, p. 320, pi. 26, fig. 2. 

 Clavulina obscura Chaster, First Rep. Southport Soc. Nat. Sci., 1892, p. 58, pi. 1, 



fig. 4.— Earland, Journ. Quekett Micr. Club, ser. 2, vol. 9, 1905, p. 206.— 



Heron-Allen and Earland, Journ. Roy. Micr. Soc, 1908, p. 311; Proc. 



Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 59, pi. 4, fig. 6; Journ. Roy. Micr. 



Soc, 1916, p. 42; Trans. Linn. Soc London, ser. 2, vol. 11, 1916, p. 233. 



This small species described by ('haster from off Southport has 

 been recorded by Heron-Allen and Earland from shore sands of Bog- 

 nor, Sussex, from nine stations in the Clare Island region, from off 

 South Cornwall, and from four stations off the west of Scotland. I 

 have seen no specimens from the western Atlantic which are com- 

 parable to this species as figured b}^ the English writers. 



clavulina TRICARINATA d'Orbisny. 



Plate 17, figs. 3, 4. 



Clavulina tricarinata d'Orbiqny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, 

 "Foraminifferes," p. Ill, pi. 2, figs. 16-18. — Cushman, Proc. U. S. Nat. Mus., 

 vol. 59, 1921, p. 52, pi. 12. figs. 1, 2; Publ. 311, Carnegie Inst. Wash., 1922, 

 p. 29, pi. 3, fig. 3. 



Clavulina angularis Woodward (not d'Orbigny), Journ. New York Micr. Soc, 

 1885, p. 150.— Goes, Bull. Mus. Comp. Zool., vol. 29, 1896, p. 37.— Flint, 

 Rep. U. S. Nat. Mus., 1897 (1899), p. 289, pi. 36, fig. 2.— Chshman, Papers 

 Dept. Marine Biol. Carnegie Inst., vol. 9, 1918, pp. 271 et seq. 



Valvulina triangularis d'Orbigny, forma Clavulina angularis Goe.s, Kongl. 

 Svensk. Vet. Akad. Handl., vol. 19, No. 4, 1882, p. 86, pi. 11, figs. 387-389. 



Description. — Test elongate, tapering, triangular or quadrangular, 

 in transverse section, increasing in diameter to the apertural end; 

 chambers numerous, those of the early triserial portion obscure, those 

 of the uniserial portion distinct, each with three or more lateral 

 angles in line with those above and below; sutures in the uniserial 

 portion distinct, slightly depressed; wall arenaceous but smoothly 

 finished; aperture circular, terminal, without a definite neck but 

 with a small valvular tooth; color white or gray. 



Length up to 3 mm. 



Disirihution. — This species was originally described by d'Orbigny 

 from shore sands of Cuba. It was placed by Brady as a synonym of 

 C. angularis d'Orbigny described from the Mediterranean. As I 

 have already shown," the two certainly seem to be distinct species. 

 The West Indian species is strongly angled throughout, while that 

 of the Mediterranean has its later chambers rounded. 



The species is evidently common in shallow water in the West 

 Indian region and at Bermuda. I have it from the latter place, 



M Proc. U. S. Nat. Mus., vol. sa, 1921, p. 53. 

 53568—22 7 



