20 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



somewhat bluntly carinate edges of the test often becoming sinuous ; 

 sutures fairly distinct, only slightly if at all depressed; wall smooth 

 or slightly roughened, with minute pits ; aperture generally rounded 

 at the end of a distinct neck, and with a single short tooth. Length, 

 0.6-0.75 mm. ; breadth, 0.3-0.4 mm. ; thickness, 0.15-0.2 mm. 



Many different forms similar to those shown in our figures have 

 been assigned numerous specific names. d'Orbigny's originals seem 

 to be of the form that has polygonal chambers and a distinctly ex- 

 serted neck. The degree of sinuosity of the edges of the chambers 

 is very variable. Our specimens cover a wide range of territory 

 including a number of Albatross stations, data for which are given 

 in the accompanying table. From our other stations it occurs at 

 Kangiroa; Kutavu; 40 to 50 fathoms off Fiji Islands; Makemo 

 Lagoon; Hereheretue; Pinaki Atoll; Rongelap Atoll, Marshall 

 Islands; Port Lotten, Kersail, Caroline Islands. 



QUINQUELOCULINA BIDENTATA d'Orbigny 



Plate 5, Figure 5 



Quinqueloculina Mdentata d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 

 " Foraminiferes," p. 197, pi. 12, figs. 18-20, 1839.— Cushman, Proc. U. S. 

 Nat. Mus., vol. 59, p. 65, pi. 15, figs. 11, 12, 1921; Carnegie Inst. Wash- 

 ington Publ. 311, p. 54, 1922; Publ. 342, p. 59, pi. 22, figs. 1, 2, 1924. 



Test somewhat longer than broad, periphery squarely truncate or 

 somewhat concave; chambers fairly distinct, rounded or polygonal 

 in transverse section; sutures somewhat obscure; wall composed on 

 the exterior of rather coarse sand grains, but fairly smoothly fin- 

 ished ; aperture somewhat extended with a slight lip and thin plate- 

 like tooth, which extends out beyond the opening. Length, 1 mm. ; 

 breadth, 0.6 mm. 



This species seems to be identical with that described by d'Orbigny 

 from the West Indian region. I have already recorded it from 

 Samoa. It is, however, not nearly so common in the region as are 

 the other two arenaceous forms. Specimens occurred only off the Fiji 

 Islands; Mokaujar Anchorage, Levuka, 12 fathoms; and Nairai 

 Islands, 12 fathoms. 



QUINQUELOCULINA COSTATA d'Orbipny 



Plate 5, Figures 6, 7 



Quinqueloculina costata d'Orbigny, Ann. Sci. Nat., vol. 7, p. 301, No. 3, 1826. — 

 Terquem, Mem. Soc. Geol. France, ser. 3, vol. 1, p. 63, pi. 6 (11), figs. 

 3 a-5 c, 1878.— Cushman, U. S. Nat. Mus. Bull. 71, pt. 6, p. 49, pi. 15, fig. 1, 

 1917; Carnegie Inst. Washington Publ. 311, p. 66, pi. 11, fig. 5, 1922; 

 U. S. Nat. Mus. Bull. 104, pt. 6, p. 31, pi. 3, figs. 7 dr-c, 1929.— Cushman 

 and Valentine, Contr. Dept. Geol. Stanford Univ., vol. 1, no. 1, p. 12, pi. 3, 

 figs. 1 a-c, 1930. 



