74 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



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

 tube, straight or slightly curved witli a swollen proloculum at the 

 proximal end, distal end open and serving as the aperture; wall com- 

 posed of sand grains, interior usuall}^ smoothly finished, exterior often 

 rough, in some species the exterior smoothly finished and the cement 

 in greater excess. 



The genus as a rule seems to be very widely distributed but most 

 abundantly represented in cool waters, temperature evidently having 

 more control than depth, especially in the case of //. siibnodosa. 



HYPERAMMINA ELONGATA H. B. Brady. 



Plate 29, fig. 4. 



Hyperammina elongata H. B. Brady (part) Aun. Mag. Nat. Hist., ser. 5, vol. 1, 

 1878, p. 433, pi. 20, figs. 2a, h; Quart. Joiirn. Micr. Sci., vol. 19, 1879, p. 72; 

 Denkschr. Akad. Wiss. Wien, vol. 42, 1881, p. 98. — Balkwill and Wright, 

 Proc. Roy. Irish Acad., vol. 3, 1882, p. 546.— H. B. Brady, Eep. 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. London, 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).— Kiaer, Norske Nordliavs Expedi- 

 tion, No. 25, 1899, p. 4.— Rhumbler, Arch. Prot., vol. 3, 1903, p. 258, figs. 

 98a, 6 (in text).— Cushman, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 60, figa. 

 73, 74 (in text). — Awerinzew, Mem. Acad. Imp. Sci. St. Petersburg, ser. 8, 

 vol. 29, No. 3, 1911, p. 11.— Pearcey, Trans. Roy. Soc. Edinburgh, vol. 49, 

 1914, p. 1004. — Heron-Allen and Earland, Trans. Linn. Soc. London, 

 vol. 11, pt. 13, 1916, p. 220. 



Bactrammina elongata Eimer and Fickert, Zeitschr. Wiss. Zool., vol. 65, 1899, 

 p. 673. 



Description. — Test elongate cylindrical, consisting of a subglobular 

 proloculum and long, slender tubular second chamber, of lesser 

 diameter than the proloculum; wall composed of sand grams firmly 

 cemented, usually consisting of a suigle layer, exterior rough but the 

 interior usually smootlily finished, cement yellowish brown; aperture 

 at the distal end of the tube, circular without a lip or other modifica- 

 tion; color dependent upon the constituent sand particles. 



Diameter, about 0.5 mm; length, up to 8 mm. 



Distribution. — This seems to be a very common and well-distrib- 

 uted species occurrmg throughout the Atlantic both in typical 

 Globigerina-ooze and other types of bottom. It is recorded from 

 the Arctic to the Antartic and is common off the coasts of Europe 

 and on our own shores, the Atlantic coast, Gulf of Mexico, and 

 Caribbean Sea, as well as off the South American coast. 



Specimens with the proloculum intact are not so common as those 

 which are broken and show only the tubular chamber, but m well- 

 preserved material a number of complete specimens are usually 

 found. 



