94 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



AMMOBACULITES PSEUDOSPIRALE (Williamson). 



Plate 19, figs. 1, 2. 



Proteonina pseudospirale Williamson, Recent Foraminifera of Great Britain, 



1858, p. 2, pi. 1, figs. 2, 3. 

 Eaplophragmium pseudospirale Siddall, Cat. British Recent Foram., 1879, p. 4. — 



H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 302, pi. 33, figs. 



1-4. — Heron-Allen and Earland, Proc. Roy. Irish Acad., vol. 31, pt. 64, 



1913, p. 45. 



There are numerous specimens in the Philippine material which 

 seem to be very close to this species, which is known from the North 

 Atlantic. It has the general shape and character of the wall which 

 characterizes British specimens, the only difference being in the more 

 definite division of the chambers. The early part is coiled and the 

 later part uncoiled, which should place it in the genus Ammohacvlites. 

 Many of the specimens seem somewhat like A. calcareum. It seems, 

 however, distinct from that species at the stations at which it occurs. 

 The material of the wall is either a dark material, probably some sort 

 of sand or light calcareous material. 



There are records for this species at 18 stations, ranging in depth 

 from 88 to 554 fathoms (161 to 1,012 meters), the average 278 fathoms 

 (508 metere), bottom temperatures range from 43° to 62.4° F. (6.1° to 

 16.8° C), the average about 50° F. (10° C). These stations include 

 the following regions: Off Jolo; Verde Island Passage; Tanon Strait, 

 east coast of Negros; off western Bohol; Sogod Bay, southern 

 Leyte; east of Masbato; between Marinduque and Luzon; Pacific 

 Ocean, east coast of Mindanao; off southeastern Mindoro; China Sea 

 off southern Luzon; Ragay Gulf, Luzon; off northern Mindanao; be- 

 tween Negros and Siquijor; and to the south in Sibuko Bay, Borneo, 

 and between GiUolo and Makyan Islands. 



Ammobaculites pseudospirale — Material examined. 



Cat. 

 No. 



12468 

 12465 

 12469 

 12462 

 12466 

 12467 

 13312 

 12461 

 12463 

 12464 

 12470 

 13313 

 14756 

 8206 

 13315 

 13314 

 13316 

 13317 

 13318 

 13319 

 13320 



Coll. of- 



U.S.N.M. 



U.S.N.M. 

 U.S.N. M. 

 U.S.N.M. 



lu.S.N.M. 



U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 



[u.S.N.M. 



U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 

 U.S.N.M. 



Locality. 



13 45 30 N. 



6 03 15 N. 

 9 16 45 N. 

 9 40 50 N. 



10 10 00 N. 



12 25 18 N. 



13 38 30 N. 

 8 09 06 N. 



12 25 35 N. 



13 53 00 N. 



7 43 45 N. 



13 14 15 N. 

 13 24 SON. 



8 48 44 N. 



9 11 00 N. 

 4 06 50 N. 

 4 12 44 N. 



Makyan Id. 



120 30 15 E. 

 120 35 30 E. 

 123 21 15 E. 

 123 39 45 E. 



Depth 



in 

 fath- 

 oms. 



123 37 15 E... 

 121 42 45 E... 

 126 31 45 E... 



121 31 35 E... 

 120 26 45 E... 



122 03 45 E... 



122 44 45 E... 



123 03 70 E... 

 123 27 35 E... 

 123 23 00 E... 

 118 47 20 E... 

 118 27 44 E... 



(NE.),N.66°W. 



393 

 318 

 225 

 220 



125 04 15 E...! 554 



218 

 195 

 249 

 312 

 248 



221 



327 



254 

 347 

 305 

 275 



Bot- 

 tom 

 tem- 

 pera- 

 ture. 



° F. 

 43.7 



53.6 

 53.9 



52.8 



50.5 

 52.8 

 46. 4 

 49.3 

 47.4 



53.5 

 44.0 

 43.3 



Character of 

 bottom. 



gn. m., s. . . 

 fne.s., sh. . 

 sft. gn. m.. 

 gn. m 



pr. s., m 



gn. m 



gu- m 



gn. m.. 

 gy. m., glob, 

 dk. gy. s.... 



gy. m., glob. 



CO. s. . 

 gy. m. 



gn. m. 

 gy. m. 

 gn. m. 

 gy. m. 



Abimdance. 



Few. 

 Rare. 

 Rare. 

 Few. 



Frequent. 



Few. 

 Few. 

 Rare. 

 Few. 

 Common. 



Common. 



Common. 



Few. 



Few. 



Few. 



Rare. 



Few. 



Rare. 



