TROPICAL PACIFIC FORAMDvflFERA OF "ALBATROSS" 9 



Buliminoides williamsoniana Cushman, Q. S. Nat. Mus. Bull. 71, pt. 2, p. 90, 

 fig. 144 (in text), 1911; Carnegie Inst. Washington Publ. 311, p. 31, pi. 3, 

 fig. 7, 1922; U. S. Nat. Mus. Bull. 104, pt. 3, p. 113, 1922; Carnegie Inst. 

 Washington, Publ. 342, p. 25, pi. 7, figs. 3, 4, 1924; Cushman Lab. Foram. 

 Res. Special Publ. No. 4, pi. 22, fig. 5, 1933; No. 5, pi. 27, figs. 6, 7, 1933.— 

 Bermudez, Mem. Soc. Cubana Hist. Nat., vol. 9, p. 194, 1935. 



Test elongate, subcylindrical, broadly rounded at the initial end 

 and increasing slightly in breadth toward the apertural end, circular 

 or nearly so in transverse section; chambers and sutures indistinct 

 owing to ornamentation of the surface, which consists of longitudinal 

 costae usually somewhat spirally twisted, running unbroken from 

 the mitial to the apertural end and to the rim of the aperture; aperture 

 rounded, circular or elliptical, m the middle of the sunken apertural 

 face. Length, up to 0.75 mm.; diameter, 0.15-0.20 mm. 



This is a widely distributed species in the Indo-Pacific with the 

 exception of the records from the Tortugas region in the Atlantic, 

 where it occurs rarely but in typical form. The aperture is often 

 broken owing probably to the fact that the young are developed in 

 the final chamber and the wall breaks down when they are released. 

 Specimens have occurred at the following shallow-water stations: 

 12 fathoms, Levuka, Fiji; Mokaujar Anchorage, Fiji; 12 fathoms, 

 Nairai, Fiji; Port Lotten, Kersail, Caroline Islands; and Rangiroa. 

 In the Albatross material it occurred only at station H3954, west end 

 of Nomuka Island, N. 33°, 6 miles east, in 600 fathoms, at 39.2° F., 

 co.s.pum.pter.oz. 



Genus ROBERTINA d'Orbigny, 1846 



Robertina d'Orbigny, Foram. Foss. Bass. Tert. Vienne, p. 202, 1846. 



Genoholotype. — Robertina arctica d'Orbigny. 



Test an elongate close spiral, the sphal suture distinct; chambers 

 several in each whorl, in microspheric young like Bulimmella, later 

 formmg a double series; wall calcareous, fmely perforate; aperture 

 elongate, loop-shaped. Eocene to Recent. 



ROBERTINA SUBCYUNDRICA (H. B. Brady) 



Plate 3, Figure 14 



Bulimina subcylindrica H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, p. 56, 

 1881; Rep. Voy. Challenger, Zoology, vol. 9, p. 404, pi. 50, figs. 16a, b, 1884.— 

 MiLLETT, Journ. Roy. Micr. Soc, 1900, p. 277, pi. 2, fig. 6. — Sidebottom, 

 Journ. Roy. Micr. Soc, 1918, p. 122, pL 3, fig. 7. 



Robertina subcylindrica Cushman and Parker, Contr. Cushman Lab. Foram. 

 Res., voL 12, p. 95, pL 16, figs. 10a, b, 1936. 



Test subcylindrical, broadly rounded at both ends, about four 

 pairs of chambers in the last-lormed whorl, the chambers of the lower 

 series much more elongate than those of the upper ones, somewhat 

 inflated; sutures distinct, slightly depressed, somewhat limbate; wall 



