54 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



Variety differing from the typical in the greater number of uniserial 

 chambers, the cylindrical form of the test, and the much more promi- 

 nent depressions at the base of the chambers along the sutures. 



This variety is widely distributed m the Pacific in Recent samples, 

 and it is also recorded by Schubert from the Globigerina marl of late 

 Tertiary age from Panaras in the Bismarck Archipelago, and by Koch 

 from the late Tertiary of Kabu, Java. Most of the records are from 

 offshore stations, and the same holds true in the Albatross material 

 imder discussion. The species has not occurred at any of the shoal- 

 water stations, all of them being from the Albatross dredgmgs, data 

 for which are given in table 24. 



SIPHOGENERINA COLUMELLARIS (H. B. Brady) 



Plate 15, Figure 5 



Sagrina columellaris H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, p. 64, 1881; 

 Rep. Voy. Challenger, Zoology, vol. 9, p. 581, pi. 75, fig?. 15-17, 1884.— 

 Chapman, Proc. Zool. Soc. London, 1895, p. 36. — Fornasini, Rend. Accad. 

 Sci. Bologna, vol. 1, p. 55, fig., 1896-97; Mem. Accad. Sci. 1st. Bologna, ser. 5, 

 vol. 8, p. 391, fig. 41, 1900. — Chapman, Journ. Linn. Soc. Zool., vol. 28, p. 

 404, 1902.— MiLLETT, Journ. Roy. Micr. Soc, 1903, p. 270, pi. 5, figs. 10, 11.— 

 Bagg, Proc. U. S. Nat. Mus., vol. 34, p. 151, 1908. — Heron-Allen and 

 Earland, Trans. Zool. Soc. London, vol. 20, p. 676, 1915. — Sidebottom, 

 Journ. Roy. Micr. Soc, 1918, p. 148, pi. 5, fig. 24. — Heron-Allen and 

 Earland, British Antarctic {Terra Nova) Exped., Zoology, vol. 6, p. 185, 

 1922; Journ. Linn. Soc. Zool., vol. 35, p. 626, 1924. 



Siphogenerina {Sagrina) columellaris EijGER, Abh. kon. bay. Akad. Wiss. Munchen,. 

 CI. II, vol. 18, p. 316, pi. 9, figs. 28, 31, 33, 1893. 



Siphogenerina columellaris Silvestri, Atti Accad. Pont, Nuovi Lincei, ann. 55, 

 p. 1, figs. 1, 2, 1902.— Cushman, U. S. Nat. Mus. Bull. 71, pt. 3, p. 104, 

 pi. 47, figs. 2, 3, 1913; Bull. 100, vol. 4, p. 276, pi. 56, fig. 1, 1921; Carnegie 

 Inst. Washington Publ. 342, p. 29, pi. 8, figs. 5, 6, 1924; Proc. U. S. Nat. 

 Mus., vol. 67, art. 25, p. 11, pi. 2, figs. 4, 11; pi. 3, figs. 1-4; pi. 4, figs. 5, 6; 

 pi. 5, figs. 9-11, 1926. 



Siphogenerina glabra Schlumberger, Feuille Jeun. Nat., ann. 13, p. 118, pi. 3, 

 fig. 1, 1883. — Chapman and Parr, Australasian Antarctic Exped., ser. C,, 

 vol. 1, pt. 2, p. 96, 1937.— OvEY, Journ. Roy. Micr. Soc, vol. 47, p. 119, 1937^ 



Test elongate, subcylindrical, somewhat tapering, straight or very 

 slightly curved; chambers comparatively few, those of the uniserial 

 portion well rounded, shorter than broad; sutures only slightly con- 

 stricted; aperture large, terminal, with a very short tubular neck and 

 broad flaring lip; wall smooth. Length, up to 2.25 mm.; diameter^ 

 0.50 mm. 



This is the least common of the species of the genus in our material. 

 It has occurred in only one of the shoal-water stations, in 24 fathoms 

 off Nairai, Fiji, and rarely at three of the Albatross stations, data for 

 which are given in table 25. The figured specimen is a megalospheric 

 one in which the proloculum is very large, but the general characters 

 of the test are typical. 



