FOEAMINIFEKA OF THE ATLANTIC OCEAN". 



15 



pressed, apertural end without a definite tubular neck; color grayish 

 brown. 



Length up to 7 mm. 



Distnbution. — Type specimen (U.S.N.M. No. 10663) from D2572 

 off the Georges Banks. It also occurred in this same region at two 

 other stations. 



The species described by Pearcey from the Antarctic is similar 

 to this in general characters but all the specimens of tliis northern 

 variety lack the definite tubular neck and the coloration noted in the 

 species. 



Pearcey records the species from Scotia station 420 in 2,620 

 fathoms (4,791 meters) as abundant but not found elsewhere. 



Reophax robustus, var. septentrionalis- — ninterial examined. 



REOPHAX ADUNCUS H. B. Brady. 



Plate 5, fig. 1. 



Reophax adunca H. B. Br.\dy, Proc. Roy. Soc. Edinburgh, vol. 11, 1882, p. 715; 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 296, pi. 31, figs. 23-26.— 

 Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 274, pi. 18, fig. 5.— Cushman, 

 B.ill. 71, U. S. Nat. Mus., pt. 1, 1910, p. 89, fig. 125.— Chapman, Journ. Linn. 

 Soc. Zoology, vol. 30, 1910, p. 400.— Pearcey, Trans. Roy. Soc. Edin- 

 burgh, vol. 49, 1914, p. 1005. 



Description. — Test composed of several subglobular, pyriform or 

 slightly compressed chambers arranged in a linear series but not 

 usually in a straight line, more often being somewhat irregular, con- 

 strictions between the chambers usually deep, walls thin, composed 

 of sand grains forming a roughened surface; color gray, yellowish or 

 reddish brown. 



Length 2.5 mm. or more. 



Distribution.— The Challenger Atlantic records for this species are 

 station 78, south of the Azores, latitude 37° 26' N.; longitude 25° 13' 

 W., in 1,000 fathoms (1,829 meters); station 85 off the Canaries, 

 latitude 28° 42' N.; longitude 18° 06' W.; depth 1,125 fathoms (2,057 

 meters); station 120 off Brazil, latitude 8° 37' S.; longitude 34° 28' 

 W., in 675 fathoms (1,234 meters); station 323 east of Buenos Aires, 

 latitude 35° 39' S.; longitude 50° 47' W., in 1,900 fathoms (3,475 

 meters) and station 332 in the South Atlantic, latitude 37° 29' S.; 



