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BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



Genus HYPERAMMINA H. B. Brady, 1878. 



Rhabdo pleura? Dawson, Ann. Mag. Nat. Hist., ser. 4, vol. 7, 1871, p. 86. 

 Hyperammina H. B. Beady (type, E. elongata H.B.Brady), (part), Ann. Mag. 



Nat. Hist., ser. 5, vol. 1, 1878, p. 433. — Butschli, in Bronns Klassen 



und Ordnungen des Thierreichs, vol. 1, 1880, p. 193. — H. B. Brady, Rep. 



Voy. Challenger, Zoology, vol. 9, 1884, p. 257. — Rhumbler, Nachr. kon. 



Ges. Wiss. Gottingen, 1895, p. 82; Arch. Protistk., vol. 3, 1903, p. 257. 

 Hyperammina+Bactrammina Eimer and Fickert, Zeitschr. wiss. Zool., vol 65, 



1899, pp. 673, 675. 



Description. — Test free, elongate, in general a simple cylindrical 

 tube with a swollen proloculum at the proximal end, the distal end 

 open and serving as the aperture, wall composed of sand grains, 

 interior usually smoothly finished. 



There are several species of Hyperammina in the North Pacific, 

 but in general they are the species that are also known from other 

 ocean basins. In general they are found in cool water and often at 

 considerable depths. 



HYPERAMMINA ELONGATA H.B.Brady. 



Hyperammina elongata H. B. Brady (part), Ann. Mag. Nat. Hist., ser. 5, vol. 

 1, 1878, p. 433, pi. 20, figs. 2 a, b; Quart. Journ. Micr. Sei., vol. 19, 1879, p. 72; 



Denkschr. kais. Akad. Wiss. Wien, 

 vol. 42, 1881, p. 98— Balkwill and 

 Wright, Proc. Roy. Irish Acad., 

 vol. 3, 1882, p. 546.— H. B. Brady, 

 Rep. Voy. Challenger, Zoology, vol. 

 9, 1884, p. 257, pi. 23, figs. 4, 7 (not 9, 

 10).— Goes, Kongl. Svensk. Vet. 

 Akad. Handl., vol. 25, no. 9, 1894, 

 p. 17, pi. 4, figs. 56-58 (not 55).— 

 Chapman, Proc. Zool. Soc. Lon- 

 don, 1895, p. 13.— Goes, Bull. Mus. 

 Comp. Zool., vol. 29, 1896, p. 22.— 

 Flint, Rep. U. S. Nat. Mus., 1897 

 (1899), p. 270, pi. 10, fig. 2 (part).— 

 Ki^er, Norske Nordhavs-Exp., no. 

 25, 1899. p. 4. — Rhumbler, Arch. 

 Protistk., vol. 3, 1903, p. 258, figs. 

 98 a, fe, (in text). 

 Bactrammina elongata Eimer and Fick- 

 ert, Zeitschr. wiss. Zool., vol. 65, 

 1899, p. 673. 



Description. — Test elongate, con- 

 sisting of a long tubular portion of 

 4 small diameter, composed of sand 

 grains, proloculum broadly rounded, 



Figs. 73-74.— Hyperammina elongata. 73, ° x . , , . . 



test of comparatively large sand grains, usually considerably larger than the 

 fromshallowwater. x is. 74, test of fine diameter of the tube, wall usually 



MATERIAL FROM DEEPER WATER. X 12. . . „ , 'll M 



consisting or but a single layer or 

 sand grains with a varying amount of cement, smooth on the interior 

 surface, rougher on the exterior; aperture at the distal end of the 



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