FORAMINIFEIL\ OF THE ATLANTIC OCEAN 27 



also by the retral processes which are very short and broad, averaging 

 about 10 in number; aperture composed of several rounded openings 

 at the base of the apertural face. 



Diameter, 0.50 mm.; thickness, 0.22 mm. 



D'Orbigny's types were from "the coast of Patagonia, near the 

 Rio Negro, and also from the Falklands." The species is common in 

 this region in the collections made by Dr. Waldo Schmitt. It is a 

 smooth, polished species with a fairly thick wall which may be dis- 

 tinguished from E. poeyanum (d'Orbigny) of the West Indian region 

 which somewhat resembles this. Both of these species have been 

 included under the name ^' Polystomella striato-punctata" but are very 

 different from that species as has been noted. 



ELPHIDIUM ARCTICUM (Parker and Jones) 



Plate 11, figures 1-6 



Polystomella ardica Parker and Jones, in H. B. Brady, Trans. Linn. Soc. 

 Zool., vol. 24, 1864, p. 471, pi. 48, fig. 18.— Dawson, Canad. Nat., vol. 

 5, 1870, p. 177, pi., fig. 8; Amer. Journ. Sci., ser. 3, vol. 1, 1871, p. 206, 

 fig. 8; Ann. Mag. Nat. Hist., ser. 4, vol. 7, 1871, p. 86, fig. 8.— H. B. 

 Brady, Ann. Mag. Nat. Hist., ser. 5, vol. 1, 1878, p. 437, pi. 21, figs. 

 13 a-d; Ann. Mag. Nat. Hist., ser. 5, vol. 8, 1881, p. 415; Denkschr. 

 Akad. Wiss., Math.-Nat. CI., vol. 43, 1881, p. 18; Rep. Voy. Challenger, 

 Zoology, vol. 9, 1884, p. 735, pi. 110, figs. 2-5.— Woodward, The Observer, 

 vol. 4, 1893, p. 201.— Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 25, 

 No. 9, 1894, p.. 100, pi. 16, fig. 813.— Awerinzew, Mdm. Acad. Imp. 

 Sci., St. P6tersbourg, ser. 8, vol. 29, No. 3, 1911, p. 26. — Heron- Allen 

 and Earland, Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 146. — 

 CusHMAN, Rep't Canadian Artie Exped., pt. M, 1913, p. 11, — Heron- 

 Allen and Earland, Trans. Linn. Soc. London, ser. 2, vol. 11, 1916, 

 p. 283.— CusHMAN, Contrib. Canadian Biol., 1921 (1922), p. 14. — (?) 

 Koch, Ber. Schweiz. Pal. Ges., vol. 18, 1923, p. 357. 



Polystomella crispa Linnaeus, var. ardica Parker and Jones, Phil. Trans., 

 vol. 155, 1865, p. 401, pi. 14, figs. 25-30. 



Nonionina boueana Balkwill and Wright, Trans. Roy. Irish Acad., vol. 

 28, Sci., 1885, p. 353, pi. 13, fig. 27. 



Test of comparatively large size for the genus, compressed, periph- 

 ery broadly rounded, margin only slightly lobulate, umbilical regions 

 slightly depressed, smooth; chambers comparatively few, 10 to 12 

 in the last-formed coil, very slightly inflated; sutures distinct, 

 slightly depressed, marked by a double row of rounded pores, no 

 distinct retral processes; wall apparently sometimes double, often 

 slightly rugose; aperture consisting of a row of small rounded pores 

 at the base of the apertural face with occasionally a second row 

 slightly above it. 



Diameter, 1.25 mm.; thickness, 0.50 mm. 



The types of this species were described and figured by Parker 

 and Jones in Brady's Shetland paper. The species is widely distri- 

 buted in the Arctic and North Atlantic; Gulf of St. Lawrence CDaw- 

 62995—30 3 



