NO. 1 CUSHMAN, MCCULLOCH: ARENACEOUS FORAMINIFERA 33 



Distribution. — Galapagos Islands: Cartago Bay, Albemarle Island, 

 12 fms. ; off Hood Island, 160 fms. 



Genus MARSIPELLA Norman, 1878 

 Marsipella elongata Norman 



Proteonina, species, W. B, Carpenter, Proc. Roy. Soc. London, vol. 

 18, 1869, p. 60. 



Marsipella elongata Norman, Ann. Mag. Nat. Hist., ser. 5, vol. 1, 

 1878, p. 281, pi. 16, fig. 7.— Carpenter, The Microscope, ed. 6, 1881, 

 p. 561, figs. 320d-f. — H. B. Brady, Rep. Voy. Challenger, Zoology, 

 vol. 9, 1884, p. 265, pi. 24, figs. 10-19.— Chapman, Proc. Zool. Soc. 

 London, 1895, p. 13.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 

 270, pi. 12, fig. 1.— Rhumbler, Arch. Prot., vol. 3, 1903, p. 365, fig. 

 110 (in text); Plankton Exped., Foraminiferen, pt. 1, 1909 (1911), 

 pi. 2, fig. 21; pt. 2, 1913, p. 382.— Cushman, Bull. 104, U. S. Nat. 

 Mus., pt. 1, 1918, p. 23, pi. 8, figs. 2, 3.— Heron-Allen and Earland, 

 British Antarctic Exped., Zoology, vol. 6, 1922, p. 90, pi. 3, figs. 10-12; 

 Lacroix, Bull. Instit. Oceanographique, no. 527, 1928, p. 15, figs. 14, 

 15 (in text).— Hofker, Siboga-Exped., Mon. IVa, 1930, p. 110, pi. 45, 

 figs. 15a, b. — Cushman, Special Publ. no. 5, Cushman Lab. Foram. 

 Res., 1933, pi. 1, fig. 22.— Earland, Discovery Rep'ts, vol. VII, 1933, 

 p. 73. 



Test elongate, somewhat fusiform, irregularly curved, thickest in 

 the central portion and gradually tapering toward the ends; walls com- 

 posed of sponge spicules with the central thicker portion covered with 

 sand grains, spicules almost exclusively forming the ends of the tubes, 

 laid together lengthwise and cemented firmly in place; aperture at the 

 ends of the tube. 



Our largest specimens measure nearly 7.00 mm. 



These Pacific specimens are almost entirely composed of sponge 

 spicules with very little arenaceous material added. The central por- 

 tion, however, is usually much greater in diameter than the ends. 



It has occurred in some numbers at Station 487 but was not seen 

 elsewhere. 



Distribution. — At Station 487, off Chatham, Galapagos Islands, in 

 400 fms. 



