FOBAMINIFERA OF THE ATLANTIC OCEAN. 

 Astroihiza liniicola — material examined. 



Cat. 

 No. 



iNo.of 

 Coll. of— i speci- 

 mens. 



B.S.N.H. 

 B.S.N.H. 

 U.8.N.M. 



10+ 

 3 

 10+ 



Station. 



U.S.F.C. sta. 

 987 (1881). 



Locality. 



^?H?om 



Off Cape Ann, Mass 



Vineyard Sound, Mass. .. 

 Off Marthas Vineyard, 

 Mass. 



fath- 

 oms. 



tem- 

 pera- 

 ture. 



Charac- 

 ter of 

 bottom. 



Abun- 

 dance. 



Common. 



ASTRORHIZA ARENARIA Norman. 



Plate 2, figs. 1-3; plate 3, fig. 1. 



Astrorhiza aretiaria Norman. Proc. Roy, Soc. London, vol. 25, 1876, p. 213. — H. B. 

 Brady, Quart. Journ. Micr. Sci., vol. 29, 1879, p. 43. — Butschli, in Bronn, 

 Klasaen und Ordungen, Thier-Reichs, 1880, p. 194, pi. 5, fig. 12.— H. B. 

 Brady, Proc. Roy. Soc. Edinburgh, vol. 11, 1882, p. 711; Rep. Yoy. Chal- 

 lenger, Zoology, vol. 9, 1884, p. 232, pi. 19, figs. 5-10.— Goiis, Kongl. Svensk. 

 Vet.-Akad. Handlingar, vol. 25, No. 9, 1894, p. 12, pi. 2, figs. 4-10.— 

 Flint, Ann. Rep. U. S. Nat. Mas., 1897 (1899), p. 265, pi. 3, fig. 2.— Rhum- 

 BLER, Arch. Prot., vol. 3, 1903, p. 217, fig. 37 (in text). — Kiaer, in 

 Due d'Orleans, Croisiere Oceanographique dans la Mer du Gronland, 1905 

 (1907), p. 559. — Heron-Allen and Earland, Journ. Quekett Micr. Club, 

 ser. 2, vol. 10, 1909, p. 407, pi. 33, fig. 2.— Pearcey, Trans. Roy. Soc. 

 Edinburgh, vol. 49, 1914, p. 997. 



Asirorhiza Umicola M. Sars (nomen nudum) (not A. limicola Lindahl), Forh. 

 Vid. Selsk. Christiania, 1868, p. 248. — Carpenter, Proc. Roy. Soc. London, 

 vol. 17, 1868, p. 173.— G. O. Sars, Forh. Vid. Selsk. Christiania. 1871 (1872), 

 p. 252. 



Astrorhiza, sp., Carpenter, Quart. .Tourn. Micr. Sci., -vol. 16. 1876, p. 221, pi. 19. 



Description. — Test compressed, t3q)icall3' with a subcirciilar mass 

 from v\ Iiich radiate short, stout arms, variable in number, or some- 

 times elongate with short lateral branches; radiate forms with a 

 rounded central chamber from which tlie tubular arms are given off; 

 vrall thick com])osed of loosely agglutinated grayish sand, outer 

 siuiace friable and rough, iimer surface smoother and fii'mer; aper- 

 tures at the ends of the tubular extensions of the central chamber, 

 usually more or less choked with fine sand grains. 



Diameter, up to 15 mm. 



IHstrihution. -Spochnens on the Euroj^ean side of tiie Atlantic are 

 known from the coasts of Norway and Sweden, off Spitzbergen, 

 North Sea and Faroe Channel. On the American side of the Atlantic 

 it is known from Davis Strait, and from three Alhatross stations given 

 by Flint in the general region ofl' Cape Cod. In the abundant 

 Alhatross material I have examined, the species has occurred at 

 numerous stations l>ul aU in the general region from Nova Scotia 

 southv/ard to Cape ilatteras. These stations range in depth from 

 82 to 1,631 fathoms, the average being somewhat less than 1,000 

 20173—18 2 



