114 BULLETIX 104, UNITED STATES NATIONAL MUSEUM. 



Description. — Test elongate, subcylindrical, composed of numerous 

 chambers which are not distinct from the surface, the main orna- 

 mentation of the surface consisting of longitudinal costae, usually 

 somewhat spirally twisted, running from the initial end to the aper- 

 ture; the aperture itself rounded, in the center of the oblique, aper- 

 tural face; the costae of the surface running in to the center, making 

 a radiate pattern about the aperture itself; color white. 



Length of the Tortugas specimen 0.4 mm. 



Distrihvtion. — -This species is one of the "finds" of the Tortugas 

 collection. It has not previously been recorded from the Atlantic. 

 Its distribution has been from shallow water of the Indo-Pacific 

 region. Brady, in the Challenger Report, gave seven localities for 

 this, as follows: "Port Stephens and Port Jackson, New South 

 Wales, 2-10 fathoms; off Levuka, Fiji, 12 fathoms; off the New 

 Hebrides, 125 fathoms; Torres Strait, 155 fathoms; Humboldt Bay, 

 Papua, 37 fathoms; Nares Harbour, Admiralty Islands, 17 fathoms." 

 Millett's specimens came from two stations in the Malay region. 

 Bagg recorded this species from a single Albatross station, H4694, in 

 865 fathoms, off the Hawaiian Islands, and in 1911 I added another 

 station, H2922, in 268 fathoms, off the same Islands. The other 

 record is from the Kerimba Archipelago, oft' the eastern coast of 

 Africa, where Heron-Allen and Earland recorded it. Its natural 

 habitat is evidently in comparatively shallow water in tropical seas. 

 It is a small species and one that is apt to be overlooked, and it may 

 be fairly common in the Caribbean and the Gulf of Mexico, although 

 it was certainly rare in the Tortugas region. 



Genus VIRGULINA d'Orbigny, 1826. 



Virgulina d'Orbigny (type, V. squammosa d'Orbigny), Ann. Sci. Nat., vol. 7, 

 1826, p. 267.— II. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 413.— Chapman, The Foraminifera, 1902, p. 172.— Cushman, Bull. 71, U. S. 

 Nat. Mus., vol. 71, pt. 2, 1911, p. 91. 



Bulimina (part) Bailey, Smithsonian Contr., vol. 2, 1851, p. 12. — Parker 

 and Jones, Ann. Mag. Nat. Hist., ser. 2, vol. 19, 1857, p. 296; Philos. Trans., 

 vol. 155, 1865, p. 375.— Williamson, Rec. Foram. Great Britain, 1858, p. 63. 



Description. — ^Test elongate, tapering, typically biserial, often be- 

 coming irregularly twisted in a spiral manner; chambers distinct; 

 sutures usually depressed; wall calcareous, thin and translucent, in 

 adults sometimes becoming thicker and opaque, perforate; aperture 

 typically a comma-shaped opening with the narrow end coming to 

 the base of the chamber; color white. 



D'Orbigny's model of Virgulina squammosa shows a biserial test, 

 more regular than some of the species now assigned to this genus, 

 but forming a very good basis for the generic characters. It is closely 

 related to Bulimina, especially in the apertural characters. 



