FOKAMINIFERA OF THE ATLANTIC OCEAN. 39 



Genus SOROSPHAERA H. B. Hrady, 1879. 



Sorosphaera H. B. Brady (type, S. confma H. B. Brady), Quart. Journ. Micr. 

 Sci., vol. 19, 1879, p. 28; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 251.— 

 Rhumbler, Arch. Prot., vol. .3. 1903, p. 235.— Clsiimax, Bull. 71, U. S. 

 Nat. Mus., pt. L 1910, p. 37. 



Description. — Test consisting of a colony of more or less inflated 

 chambei-s, without definite apertures, the walls joined to one 

 another, composed of sand grains with interstitial openings. 



A single species S. confusa H. B. Bradj'' is known. 



SOROSPHAERA CONFl SA H. H. Brady. 



Plate 15, figs. 4, 5. 



Sorosphaera confusa H. B. Brady, Quart. Jouni. Micr. Sci., vol. 19, 1879, p. 28, 

 pi. 4, figs. 18, 19: Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 251, pi. 18, 

 figs. 9, 10.— RiiUMBi.ER, Arch. Prot., vol. 3, 1903, p. 235, fig. (33 (in text).— 

 Cushman, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 37, figs. 31, 32 (in text).— 

 Pearcey, Trans. Roy. vSoc. Edinburgh, vol. 49, 1914, p. 1000. 



The origmal description was as foUows: 



Teyt free, consisting of a number of inflated or spherical cliambers of nearly uniform 

 size, irregularly crowded together and adhering to each other by their outer surfaces. 

 Walls thin, finely arenaceous in texture, with minute interstitial orifices. General 

 aperture wanting. Diameter of individual chambers alwut one twenty-fifth of an 

 inch (1 mm. ) of tlie entire colony, variable, sometimes one-sixth of an inch (4.5 mm.). 



Distribution. — The following stations are given in the Challenger 

 report for this species: South of the Rockall Bank, 630 fathoms; 

 Faroe Channel, 542 fathoms; off Drobak, Norway; off the Azores, 

 900 fathoms; North Pacific, 2,900 fathoms. Pearcey records several 

 specimens from the Weddell Sea m the Antarctic. 



In the Albatross material that I have examined the species has 

 occurred but once, then as a single but very typical specimen from 

 D2043 in 1,467 fathoms, bottom temperature 38.5° F. (39° 49' N.; 

 68° 28' 30" W.). This specimen (U.S.N.M., No. 9887) was composed 

 of six portions, all attached with a common center as the basis but 

 in an irregular manner. It was a reddish brown in color, made of 

 line sand grains, with apparently a ferruginous cement, the material 

 near the center of the mass of a lighter color. The figure and descrip- 

 tion are from Brady. 



Genus STORTHOSPHAERA F. E. Schuize, 1875. 



Siorthosphoera V. E. Schulze (type, 6'. albida F. E. Schuize), II Jahresb. <'omm. 

 wiss. Untersuch. deutsch. Meer in Kiel, 1875, p. 113. — H. B. Brady, Rep. 

 Voy. Chnllenger, Zoology, vol. 9, 1884, p. 240. — vSchaudinn, Verb. Dentsch. 

 Zool. Ges., 1899, p. 238.— RHUMBr.ER, Arch. Prot., vol. 3, 1903, p. 235. 



iJescription. —Tost free, irregularly rounded, single chambered; 

 wall thick, composed of fine whitisli sand very loosely cemented, no 

 visible aperture. 



