172 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.6 



Elphidhmi incertum Heron-Allen and Earland (not Williamson), 

 Discovery Rep'ts, vol. 4, 1932, p. 439, pi. 16, figs. 20, 21. 



Test nearly circular in side view, compressed, periphery rounded, 

 slightly lobulate in side view, umbilical region slightly depressed ; cham- 

 bers usually about 10 in the adult coil, slightly inflated, of uniform shape, 

 increasing very gradually in size as added ; sutures distinct, slightly de- 

 pressed, especially in the later portion, retral processes usually short and 

 broad, averaging about 10 in number; aperture composed of several, small 

 rounded openings at the base of the apertural face. 



Length 0.50-0.60 mm; breadth 0.45-0.50 mm; thickness 0.22-0.25 

 mm. 



Stations: A-1, A-2, A-4, W-3, C-9, 3, 4, 39, 83, 112, 120, 1062, 

 1063, 209, 225, 227, 2019, 2070, 312, 344, 501, 506. 



Distribution. — This species was described from off the Falkland 

 Islands but extends northward to Cuba in the Atlantic and to Cordova, 

 Alaska, in the Pacific. These localities show a depth range from 2 to 250 

 fms., with the greatest depth off Guadalupe Island, Mexico. 



Elphidium translucens Natland 

 Plate 19, Fig. 9 



Elphidium translucens Natland, Bull. Scripps Instit. Oceanography, 

 Tech. Ser., vol. 4, 1938, p. 144, pi. 5, figs. 3, 4.— Cushman, U.S. Geol. 

 Survey Prof. Paper 191, 1939, p. 65, pi. 20, figs, la, h. 



Elphidium granulosum Natland (not Galloway and Wissler), Bull. 

 Scripps Instit. Oceanography, Tech. Sen, vol. 3, 1933, line 28 (table). 



Test nearly circular in side view, compressed but umbonate at the 

 center, periphery broadly rounded, later portion slightly lobulate, um- 

 bilical region raised, with a translucent umbo, often showing the early 

 chambers through the clear shell material ; chambers 12 to 14 in the adult 

 coil, increasing very gradually in size as added, in the later portion with 

 the sides not extending back to the um.bo, not inflated; sutures distinct, 

 slightly if at all depressed, very slightly curved, with short, distinct, retral 

 processes, 10-12 in number; wall translucent, distinctly perforate; aper- 

 ture composed of numerous small openings at the base of the apertural 

 face of the last-formed chamber. 



Diameter 0.60-0.80 mm ; thickness 0.22-0.35 mm. 



Stations: C- 10, 35, 37, 63, 77, 115, 116, 1017, 1018, 1041, 1058, 204, 

 222, 225, 226, 227, 231, 232, 253, 254, 255, 2019, 2034, 2069, 2081, 

 2082,424,461,536,540,557. 



