TROPICAL PACIFIC FORAMINIFERA OF "ALBATROSS" 35 



LOXOSTOMA LIMBATUM (H. B. Brady) 



Plate 10, Figure 1 



Bolivina limbata H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, p. 27, 1881; 

 Rep. Voy. Challenger, Zoology, vol. 9, p. 419, pi. 52, figs. 26-28, 1884; Quart. 

 Journ. Geol. Soc, vol. 44, p. 8 (table), 1888. — Howchin, Trans. Proc. Roy, Soc. 

 South Australia, vol. 12, p. 8, 1889. — Chapman, Proc. Zool. Soc. London, 

 1895, p. 23.— MiLLETT, Journ. Roy. Micr. Soc, 1900, p. 543.— Chapman, 

 Journ. Linn. Soc. Zool., vol. 28, pp. 187, 382, 1900-1902.— Sidebottom, 

 Mem. Proc. Manchester Lit. Philos. Soc, vol. 48, pt. 2, p. 15, 1904; vol. 

 49, No. 5, p. 15, 1905. — Dakin, Rep. Ceylon Pearl Oyster Fish., vol. 5, 

 p. 234, 1906.— Chapman, Journ. Linn. Soc Zool., vol. 30, p. 32, pi. 4, fig. 83, 

 1907.— Bagg, Proc. U. S. Nat. Mus., vol. 34, p. 138, 1908.— Sidebottom, 

 Mem. Proc. Manchester Lit. Philos. Soc, vol. 54, pt. 3, p. 13, 1910. — Chap- 

 man, Journ. Linn. Soc. Zool., vol. 30, p. 404, 1910; Proc. Roy. Soc. Victoria, 

 vol. 22, p. 275, 1910.— CuSHMAN, U. S. Nat. Mus. Bull. 71, pt. 2, p. 47, fig. 78, 

 1911; Carnegie Inst. Washington Publ. 291, p. 33, 1919; U. S. Nat. Mus. 

 Bull. 100, vol. 4, p. 135, pi. 19, fig. 5, 1921.— Heron-Allen and Earland, 

 British Antarctic Exped., Zoology, vol. 6, p. 137, 1922. — Cushman, U. S. 

 Nat. Mus. Bull. 104, pt. 3, p. 36, pi. 7, fig. 3, 1922.— Heron-Allen and 

 Earland, Journ. Linn. Soc. Zool., vol. 35, p. 622, 1924; Journ. Roy. Micr. 

 Soc, 1924, p. 145.— Cushman, B. P. Bishop Mus. Bull. 27, p. 125, 1925 

 (1926).— Chapman, New Zealand Geol. Survey Pal. Bull. 11, p. 40, pi. 9, 

 fig. 6, 1926; Rep. Great Barrier Reef Comm., vol. 3, pp. 38, 39 (lists), 1931. 



Loxostoma limhatum Cushman, Cushman Lab. Foram. Res. Special Publ. No. 9, 

 p. 186, pi. 21, figs. 26-29, 1937. 



Test elongate, 3 or 4 times as long as broad, much compressed, taper- 

 ing at the ends, the middle portion with the sides nearly parallel, 

 thickest along the median line thence thinning toward the lateral 

 margins which are subacute, the whole test usually somewhat twisted; 

 chambers rapidly increasing in height as added until in the adult 

 they are as high as wide, slightly inflated; sutures very distinct, 

 strongly limbate, rather strongly curved backward; wall calcareous, 

 smooth, coarsely perforate; aperture elongate, oval, in the adult 

 becoming terminal. Length, up to about 1.00 mm.; breadth, 0.35- 

 0.40 mm.; thickness, 0.20-0.25 mm. 



This species is a common one in the Indo-Pacific region and also 

 occurs in typical form but much more rarely in the West Indian 

 region. Many records for this species, especially those without 

 figures, make it difficult to determine whether they are typical or 

 belong to some of the varieties. In our material the typical form of 

 the species has been rare, occurring only at Levuka, Fiji, in 12 fathoms, 

 and from two Albatross stations: H3830, lat. 15°00'30" S., long. 

 148°47'00" W., in 1,257 fathoms, wh. co. s. glob. vol. part., and H3984, 

 entrance to South Pass, Rongelap, 1 ji miles north in 746 fathoms, 39° F., 

 crs. CO. s. The following variety is much more common. 



