FORAMINIFERA OF THE ATLANTIC OCEAN. 85 



Haplophragmmm (part) H. B. Brady, Quart. Jouni. Micr. Sci., vol. 21, 1881, p. 



50; Rep. Voy. Challenxjer, Zoology, vol. 9, 1884, p. 312.— Chapman, The 



Foraminifera, 1902, p. 138. 

 Ammochilosloma (part) Eimer and Fickert, Zeitschr. Wiss. Zool., vol. 65, 1899, 



p. 692.— CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 126.— (Type, 



A. paudlocnlata (H. B. Brndy) = Trochammina pauciloculata H . B. Brady.) 



Descnj^tion. — Test free, early chambers spiral, later ones very 

 involute, and the last-formed volution often entirely covering th^ 

 previously formed chambers and usually at an oblique angle to the- 

 earlier gro^vth; wall arenaceous, with a variable, usually excessive- 

 amount of cement; aperture at or near the base of the apertural face 

 of the chamber, elongate, narrow, color usually reddish or yellowish 

 brown. 



This name was proposed by Eimer apd Fickert for three species of 

 TrocJtammina, T. ringens, T. galeata, and T. pauciloculata. As 

 the first of these species has already been included under. Ilaplo- 

 phragmoides, this name, Ammochilostoma, may be used for the other 

 two species with others which in their last-formed volution become 

 involute or irregularly winding about the test in a changing plane. 



AMMOCHILOSTOMA GALEATA (H. B. Brady). 



Trorhaminiixi galcatn II. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 52; 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 344, pi. 40, fige. 19-23.— Egger, 

 Abh. Bay. Akad. Wiss. Munchen, vol. 18, 1893, p. 265, pi. 5, figs. 32-34 .— 

 GoE.s, Bull. Mus. Comp. Zcol., vol. 29, 1896, p. 33. 



Ammochilostoma galeata Eimer and Fickert, Zeitschr. Wiss. Zo6!., vol. 65, 1899, 

 p. 692, fig. 39 (in text).— Cushman, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, 

 p. 127, figs. 193-201. — Pearcey, Trans. Roy. Soc. Edinburgh, vol. 49, 1914, p . 

 1011. 



Description. — Test subglobular, at least the early chambers spiral 

 and enveloped by the later ones, the last-formed chamber in the 

 adult forming at least half the area of the test ; v/all finely arenaceous 

 with much cement, smooth; aperture a narrow slit slightly above the 

 base of the apertural face, with slightly protuberant lips; color yel- 

 lowish brown. 



Diameter, 0.5 mm. 



Distribution. — There are five Atlantic Challenger stations for this 

 species, all but one in 2,200 fathoms (4,024 meters) or more. One, 

 station 24, is off Culebra Island, West Indies, in 390 fathoms (713^ 

 meters), the others from deep waters north of the Capo Verde Islands 

 southward to tlie middle South Atlantic to nearly 40° S. latitude* 

 Pearcey records it from Scotia station 459 in 1,998 fathoms (3,654 

 meters) in mid-Atlantic at 41° 30' S. 



Goes records it from a single Albatross station D2383 in 1,181 

 fathoms (2,160 meters) in the Gulf of Mexico and mentions the Carib- 

 bean but gives no station. There is no material of this species in the 

 Goes collection so far as I liave been able to determine. 



