8 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



1916, p. 49. — SiDEBOTTOM, Journ. Roy. Micr. Soc, 1918, p. 249. — Cush- 

 MAN, Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 301. — Heron-Allen and 

 Eakland, British Antarctic Exped., Zoology, vol. 6, 1922, p. 196; Journ. 

 Linn. Soc. Zool., vol. 35, 1924, p. 628.— Cushman, Publ. 342, Carnegie 

 Instit., Washington, 1924, p. 30. 



"Test planospiral, thin, equilateral, discoidal; lateral faces flat or 

 only slightly concave; peripheral edge square. Spiral sutural line 

 marked externally by a raised border of shelly deposit; surface other- 

 wise smooth. Diameter Ko to %o inch (0.42 to 0.84 mm.)." 



The above description is from the original of Brady. Among other 

 localities he mentions one in the North Atlantic and three in the 

 South Atlantic. The figured specim.ens which are after Brady are 

 from off Brazil. I have not found this species in the Albatross 

 dredgings, although Dr. J. M. Flint records it. 



Most of the records are from the Pacific. 



SPIRILUNA UMBATA H. B. Brady, var. DENTICULATA H. B. Brady 



Plate 2, figures 4, 5 



Spirillina limbata H. B. Brady, var. denticulata H. B. Brady, Rep. Voy. 

 Challenger, Zoology, vol. 9, 1884, p. 632, pi. 85, fig. 17. — Egger, Abhandl. 

 kon. bay. Akad. Wiss. Munchen, Cl. II, vol. 18, 1893, p. 396, pi. 18, fig. 

 66.^ — MiLLETT, Journ. Roy. Micr. Soc, 1903, p. 694. — Goddard, Rec. 

 Australian Mus., vol. 6, 1905-1908 (1908), p. 309.— Chapman, Subantarctic 

 Islands of New Zealand, 1909, p. 354, pi. 17, fig. 2. — Heron-Allen and 

 Earland, Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 109, pi. 9, fig. 10; 

 Trans. Zool. Soc. London, vol. 20, 1915, p. 685.— Cushman, Bull. 71, U. S. 

 Nat. Mus., pt. 5. 1915, p. 5, pi. 3, figs. 1, 2; Proc. U. S. Nat. Mus., vol. 56, 

 1919, p. 624; Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 302.— Heron- 

 Allen and Earland, British Antarctic Exped., Zoology, vol. 6, 1922, 

 p. 197. 



SpiriUina marijariUfera Wright (not Williamson), Proc. Belfast Nat. Field 

 Club, Appendix, 1885-86, p 321, pi. 26, figs. 12, a, 6.— Halkyard, Trans. 

 Manchester Micr. Soc, 1889, p. 69, pi. 2, fig. 7. 



"External form and general characters of the test resembling those 

 of Spirillina limbata; the raised spiral band covering the sutural line 

 furnished with buttress-like teeth, set at regular intervals along its 

 inner margin." 



The above description given by Brady does not mention the differ- 

 ences in the two sides of the test in this variety. The dorsal side is as 

 described, but the ventral side has large scattered tubercles obscuring 

 the suture line. 



Such specimens as that figured by Halkyard would seem to belong 

 to this variety. In the specimens figured from the Belgian coast 

 (pi. 2, fig. 5) the dorsal side has a double row of pits inside the raised 

 ridge. 



To the form described by Wright and Halkyard Heron-Allen and 

 Earland (Journ. Roy. Micr. Soc, 1930, p. 181, pi. 4, figs. 54-58) have 

 given the name Spirillina wrightii. 



