F0R.A.M1X1FEK.\ OF THE .\TLAXTIC OCEAN, 



33 



Length, up to 10 mm.; diameter, 0.25-0.40 mm. 



Distiihution. — Brady recorded the species from the Faroe Channel 

 in 540 fathoms; it also occurs off the Cape Verde Islands (Egger); 

 Gulf of Mexico, 211 to 1,345 fathoms (Goes); from four Alhatross 

 stations D2234, southward of Long Island; D2355, Strait of Yucatan; 

 D2380, Gulf of Mexico; and D2760, coast of Brazil ranging from 400 

 to 1,400 fathoms (Flint). 



In the Alhatro.'is material that I have examined it has occurred at 

 numerous stations from off Nova Scotia to the Gulf of Mexico and 

 the Caribbean Sea, depths ranging from 788 to 2,045 fathoms with 

 two shallower stations at 382 and 82 fathoms. Bottom temperatures 

 for the most part range from 36.8° to 40.6° F. 



When the outer attached foraminiforal tests are rubbed away in 

 dry material a cliitinous test is left with a certain amount of fine 

 grayish material covering the surface except where the larger particles 

 sucli as other foraminiferal tests were attached. At these places 

 there are apparently at first glance round openings, but close observa- 

 tion will show that there is here a very thin light-brown chitinous 

 layer nearly transparent. The finer material was fiUed in after the 

 larger particles for there is no coating below them. One of Bradj^'s 

 figured specimens. Challenger Report (pi. 29, fig. 6), shows this appar- 

 ently perforated condition of the test. Wlien aU the larger particles 

 are rubbed away a peculiar looking test is the result. 



Rhizammina indivisn—matevial examined. 



Subfamily 2. Saccammininae. 



Genus PSAMMOSPHAERA F. E. Schulze, 1875. 



Psammosphaera F. E. Schulze (type, P.fusca F. E. SchulzeV II Jahr. Comm. 

 Wiss. Unt. deutech. Meer in Kiel, 1875, p. 113. — Butscht.i, in IJronn, Klassen 

 und Ordnungen Thierreichs, vol. 1, 1880, p. 202. — II. IJ. Brady, Rep. Voy. 

 Challenger, Zoology, vol. 9, 1884, p. 249.— Flint, Rep. U. S. Nat. Mus., 1897 

 (1899), p. 207.— EiMER and Fiokert, Zeitschr. Wise. Zool.. vol. f)5, 1899, 

 p. 598.— RHUMBr,ER, Arch. Prot., vol. 3. 1903, p. 241.— Cushman, Bull. 7], 

 U. S. Nat. Mus., pt. 1. 1910. p. 35. 



Succummina (part) RuuiiBi.KU, Zeitschr. WIhs. ZooL, vol. 'jT, I89J, p. 4(12; Xachr. 

 Gea. Wiss. Gottingen. 1895. pp. 81, 82. 



