NO. 3 CUSHMAN AND MCCULLOCH : SOME NONIONIDAE 171 



Elphidium frigidum Cushman 

 Plate 19, Figs, 6, 8 



Elphidium frigidtim Cushman, Smithsonian Misc. Coll., vol. 89, 

 no. 4, 1933, p. 5, pi. 1, figs. So, b; U.S. Geol. Survey Prof. Paper 191, 

 1939, p. 64, pi. 18, fig. 8. 



Test usually completely involute, compressed, periphery rounded, 

 lobulate, umbilical region depressed ; chambers distinct, inflated, especially 

 in the later portion, the final chambers often enlarged and projecting 

 beyond the general contour of the test; sutures distinct, depressed, with 

 numerous, short retral processes ; wall thin, very distinctly perforate, the 

 last-formed chambers often having distinct elongate markings; aperture 

 consisting of numerous fine pores at the base of the apertural face of the 

 last-formed cham_ber. 



Length 0.60-1.00 mm; breadth 0.50-0.75 mm; thickness 0.20-0.30 

 mm. 



Stations: A-1, A-8, A-13, A-23, V-1, W-1, W-3, W-5, C-9, C-10, 

 67, 1003. 



Distribution. — This is t5^pically an Arctic species but extends south- 

 ward in cold water. The few records from our material are from northern 

 localities with four exceptions. Localities C-9, C-10, and 1003 are off 

 southern California with a depth range of 1 to 13 fms. Locality 67 is 

 Santa Maria Bay, Mexico, in 7 fms. The list of stations places this species 

 in shallow waters off the coast, from Cordova, Alaska, to Santa Maria 

 Bay, Mexico. 



Elphidium articulatum (d'Orbigny) 

 Plate 19, Fig. 7 



Polystomella articulata d'Orbigny, Voy. Amer. Merid., vol. 5, pt. 5, 

 Foraminiferes, 1839, p. 30, pi. 3, figs. 9, 10. 



Elphidium articulatum Cushman, Bull. 104, U.S. Nat. Mus., pt. 7, 

 1930, p. 26, pi. 10, figs. 6-8. — Cushman and Valentine, Stanford Univ., 

 Dept. Geology, Contr., vol. 1, no. 1, 1930, p. 21, pi. 5, figs. \^a, b. — 

 Cushman and Parker, Proc. U.S. Nat. Mus., vol. 80, art. 3, 1931, p. 10. 

 — Heron-Allen and Earland, Discovery Rep'ts, vol. 4, 1932, p. 439. — 

 Earland, 1. c, vol. 7, 1933, p. 132. — Bermudez, Mem. Soc. Cubana Hist. 

 Nat., vol. 9, 1935, p. 188.— Cushman, U.S. Geol. Survey Prof. Paper 

 191, 1939, p. 53, pi. 14, figs. 17-19. 



