FORAMINIFERA OF THE ATLANTIC OCEAN. 



19 



Distnbutinn. — Type-specimens from Albatross station D2150 in 382 

 Fathoms in the Caribbean Sea (18° 34' 45" N.; 81° 21' 10" W.), 

 bottom temperature 45.75° V. : bottom given as white coarse sand. 



Superficially this variety suggests the figures of PsammospJiaera 

 ruMica due to the similarity in the contour of the test produced by 

 the inflexibility in tlie use of the larger spicules. The arms likewise 

 are modified and instead of curving bends in them they are very much 

 angled and very awkward appearing. Almost no sand grains are 

 used in the test of the specimens from tliis station, although other 

 arenaceous species from the same dredging seem to be normal in tliis 

 particular. 



Jihubdammina coniuta, var. NpiculotcKta — material examined. 



RH.\BI>.4MMIN.4 LINEARIS H. B. Brady. 



Plate 7, fig8. 2 5. 



H'huhdaniinina Ivneuris 11. B. Brady, Quart. Jouni. Micr. .Sci., \ ol. 19, 1879, p. 37, pi. 3, 

 figs. 10, 11. — BuTscHLi, in Bronn, Klassen und Ordnungen der Thierreiclis, 

 vol. 1, 1880, p. 194, pi. 5, fig. 10.— H. B. Brady, Rep. Voy. Challenger, Zoo- 

 olog>', vol. 9, 1884, p. 2fi9, pi. 22, figs. 1-8.— A. Agassiz, Bull. Mus. Comp. 

 Zool.. vol. 15, 1888, p. 183, fig. 494 (in text\— Goes, Kongl. Svenslc. Vet. Akad. 

 Handl., vol. 25, Xo. 9, 1894, p. 18, pi. 4, figs. 65, lifi.— Flint, Rep. U. S. Nat. 

 -Mus., 1897 (1899), p. 271, pi. 14, tig. 1.— Rhumbler, 7\.rch. Prot., vol. 3, 1903, 

 p. 232, fig. 104 i,in textl. -("ushmax. Bull. 71, U. S. Nat. Mus., pt. 1, 1910, 

 p. 28, figs. 14a/ (in text). 



Description. — Test free, elongate, straight or irregularly bent, con- 

 sisting of a central, subglobular chamber from wliich cylindrical arms 

 extend in (ipj)osite directions, giving tlie appearance of a cylindrical 

 tube swollen in the middle; wall composed of sand grains firmly 

 (•emented, that of the central chamber less thick than that of the 

 arms; rather smoothly finished both within and without; aperture 

 formed by the open ends of the tubes ; color vaiiable according to the 

 material used in building the test. 



Length, up to 10 mm. 



Distrihvlion. — The following stations are given by Brady in the 

 (■haUenger report, Hardinger Fiord, Norwa}^, 126 fathoms; west coast 

 of Ireland, 816 fathoms; off Sombivro Island, West Indies, 450 fath- 

 oms; off Culebra Island, West Indies, 390 fathoms; off Pernambuco, 

 Brazil, 675 fathoms: and east of Buenos Aires, 1,900 fathoms. Goes 

 records it off Greenland in 100 meters and from the Caribliean Sea, 211 



