ART. 25 GENERA SIPHOGENEBINA AND PAVONINA CUSHMAN H 



ridges between these costae which, while they may not indicate the internal 

 structure of the chambers, serve to mark their location. The aperture ends in 

 a neatly raised, phialine, everted lip with central rounded orifice. 



Length about 1 mm. 



The type specimen is from the Miocene, Choptank Formation, 

 Jones Wharf, Maryland. I have had this specimen for study, and 

 the sutures seem much more clearly marked than in the figure. It 

 is a microsphere specimen. 



It is related to S. lamellata Cushman, which is a more extremely 

 lamellate species. 



SIPHOGENERINA COLUMELLARIS (H. B. Brady) 



Plate 2, figs. 4, 11; plate 3, figs. 1-4; plate 4, figs. 5, 6; plate 5, figs. 9-11 



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

 p. 64; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 581 pi. 75, figs. 

 15-17. — Chapman, Proc. Zool. Soc. London, 1895, p. 36. — Fornasini, 

 Rend. Accad. Sci. Bologna, vol. 1, (1896-97) 1897, p. 55, text figure; 

 Mem. Accad. Sci. 1st. Bologna, ser. 5, vol. 8, 1900, p. 391, fig. 41. — 

 CHAPMiWJ, Journ. Linn. Soc. Zool., vol. 28, 1902, p. 404. — Millett, 

 Journ. Roy. Micr. Soc, 1903, p. 270, pi. 5, figs. 10, 11.— Bagg, Proc. 

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

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

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

 land, British Antarctic Exped., Zoology, vol. 6, 1922, p. 185; Journ. 

 Linn. Soc. Zool., vol. 35, 1924, p. 626. 



Siphogenerina (Sagrina) columellaris Egger, Abh. kon. bay. Akad. Wiss. 

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



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

 55, 1902, p. 1, figs. 1, 2.— Cushman, Bull. 71, U. S. Nat. Mus.,pt. 3, 1913, 

 p. 104, pi. 47, figs. 2, 3; Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 276, 

 pi. 56, fig. 1; Publ. 342, Carnegie Inst. Washington, 1924, p. 29, pi. 8, 

 figs. 5, 6. 



Siphogenerina glabra Schlumberger, Feuille des Jeunes Naturalistes, 1883, 

 p. 118, pi. 3, fig. 1. 



Description. — Test elongate, subcylindrical, somewhat tapering, 

 straight or very slightly curved ; chambers comparatively few, those 

 of the uniserial portion weU rounded, shorter than broad; sutures 

 only shghtly constricted; aperture large, terminal, with a very short 

 tubular neck and broad flaring lip; wall smooth. 



Length about 1 mm. 



Distribution. — Brady's Challenger records for this species are as 

 follows: "Off Gomera and off Palma, Canaries, at 600 fathoms and 

 1,125 fathoms, respectively; off the Azores, 450 fathoms; off Pernam- 

 buco, 350 fathoms; on the shore at Tamatave, Madagascar; at three 

 stations on the southeast coast of Australia, 6 fathoms to 410 fathoms; 

 and at five amongst the islands of the South Pacific, 125 to 620 

 fathoms." Chapman records it from the Arabian Sea and off 

 Funafuti; Millett from the Malay Archipelago; Bagg from the region 



