24 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



overlapping at the base; wall of the test distinctly perforate; aperture 

 at the end of a short neck, which has a somewhat everted lip, and 

 apparently so far as may be determined, a short entosolenian neck. 

 Length, 0.25-0.35 mm; breadth, 0.2-0.25 mm; thickness, 0.1-0.13 mm. 



Holotype.—U.S.'NM. No. 22336, from Albatross Station H3830, 

 latitude 15° 30" S., longitude, 148° 47' W., in 1,257 fathoms. 



This species has also occurred at Albatross Station H3812, entrance 

 to Avatoru Pass, Rahiroa Atoll, 7.5 miles S., in 819 fathoms. Besides 

 these Recent stations, the species occurs in the Pliocene of California. 



This is a peculiarly formed species, which at first might be thought 

 to be an abnormal one, but its occurrence at widely separated sta- 

 tions and in both Recent and late Tertiary material shows that its 

 distinct form has been kept for a considerable period. 



LAGENA LAGENOIDES (Williamson) 



Plate 6, Figures 3-5 



Entosolenia marginata Walker and BoTS var. lagenoides Williamson, Rec. 

 Foram. Great Britain, p. 11, pi. 1, figs. 25, 26, 1858. 



Lagena lagenoides Reuss, Sitz. Akad. Wiss. Wien, vol. 46, pt. 1, p. 324, pi. 2, 

 figs. 27, 28, 1862 (1863).— Balkwill and Wright, Proc. Roy. Irish Acad., 

 ser. 2, vol. 3, p. 548, 1882. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 

 9, p. 479, pi. 60, figs. 6, 8, 9, 12, 1884.— Balkwill and Wright, Trans. Roy. 

 Irish Acad., vol. 28, p. 341, pi. 12, fig. 22, 1885.— H. B. Brady, Journ. Roy. 

 Micr. See, 1887, p. 906. — H. B. Brady, Parker, and Jones, Trans. Zool. Soc. 

 London, vol. 12, p. 223, pi. 44, fig. 23, 1888.— Wright, Ann. Mag. Nat. Hist., 

 ser. 6, vol. 4, p. 448, 1889. — Pearcey, Trans. Glasgow Nat. Hist. Soc, vol. 

 2, p. 177, 1890. — Wright, Proc. Roy. Irish Acad., ser. 3, vol. 1, p. 481, 

 1891. — Balkwill and Millett, Rec. Foram. Galway, p. 6, 1908. — Cushman, 

 U. S. Nat. Mus. BuU. 71, pt. 3, p. 39, pi. 16, fig. 2, 1913.— Heron-Allen 

 and Earland, Proc. Roy. Irish Acad., vol. 31, pt. 64, p. 88, 1913; Trans. 

 Linn. Soc. London, ser. 2, vol. 11, p. 252, 1916; Journ. Roy. Micr. Soc, 

 1916, p. 46.— Cushman, U. S. Nat. Mus. Bull. 100, vol. 4, p. 183, 1921; 

 British Antarctic Exped., Zoology, vol. 6, p. 158, 1922; U. S. Nat. Mus. 

 Bull. 104, pt. 4, p. 30, pi. 5, figs. 6-8, 1923; Bull. Scripps Inst. Oceanog., 

 Tech. Ser., vol. 1, no. 10, p. 145, 1927. — Heron-Allen and Earland, 

 Journ. Roy. Micr. Soc, vol. 50, p. 170, 1930. 



Test flask-shaped, usually much compressed, the body portion 

 oval or ovate surrounded by a simple peripheral keel of varying width 

 in different specimens, and with numerous radiating tubulations, 

 giving it in side view a somewhat scalloped appearance; body of the 

 test smooth, and usually nearly transparent; aperture projecting with 

 a distinct neck, slightly tapering, but in some specimens at least 

 with a distinct entosolenian tube. Length, up to 0.5 mm; breadth, 

 0.28 mm; thickness, 0.15 mm. 



This is a variable species, and widely distributed, as the above 

 references will show. If all the forms referred to this species are really 

 one, there is a considerable degree of variation. 



