FORAMINIFERA OF THE ATLANTIC OCEAN. 



81 



(163-265 meters)," and on the west shores of Nova Zembla. It is 

 recorded at a few stations off Africa and South America and by 

 Pearcey from the South Atlantic. Awerinzew records it from the 

 Siberian Arctic. 



I have not found it in the Albatross material, but did find it in the 

 Canadian Arctic Expedition material from the Arctic. 



TROCHAMMINA SUBTURBINATA, new species. 



Plate 16, figs. 7 and 8. 



Description. — Test subglobose, trochoid, spire very low or even 

 sunken, somewhat umbilicate, composed of two or three volutions; 

 chambers inflated, usually five or six in the last-formed volution, 

 sutures distinct and depressed; wall coarsely arenaceous, but the 

 surface smoothly finished but not polished; aperture semicircular or 

 variously shaped, at the base of the chamber; color yellowish brown. 



Diameter up to 1.5 mm. 



Distribution. — Type specimen (U.S.N.M. No. 10646) from Albatross 

 station D2140 in the Caribbean Sea. Other specimens are from the 

 same region, the Gulf of Mexico, and from the northeastern coast of 

 the United States. 



This species maj' be distinguished from T. glohulosa at once by 

 its texture, color, and less umbilicate form, from T. globigeriniformis 

 by its flattened spire and greater number of chambers in the whorl 

 and from T. turhinata by its coarser texture and more regular shape. 



The aperture may be semicircular or in some cases has a lip ex- 

 tending in and nearly dividing it into separate openings. 

 Trochammina subturbinaia — material examined. 



Locality. 



38 52 

 38 30 



38 19 

 17 3f'> 

 37 no 

 28 32 



39 15 

 14 20 

 13 29 

 12 29 



40 N.: 

 30 N.: 

 26 N.: 

 ION.: 

 00 N.: 

 00 N.: 

 00 N.: 

 30 N.: 

 00 N.: 

 CON.: 



69 24 40 W. 

 r.9 08 25 W . 

 68 20 20 \V. 

 76 46 05 W . 

 71 54 00 W. 

 88 06 00 W . 

 (■■8 08 00 W. 

 63 10 00 W . 

 62 42 40 W. 

 62 38 SOW. 



repth 



in 

 fath- 

 oms. 



1, 735 

 2, 033 

 2,369 



966 

 2,045 

 1,181 

 1,781 



821 

 1,051 

 1,630 



Bot- 

 t'-m 

 tem- 

 pera- 

 ture. 



38 



Character of 

 bottom. 



Abundance. 



frlob. oz Freqtient. 



f.'lob. 07, ! Frcauent. 



39.7 

 36.8 

 39. S 

 36.9 



m. bk.sp. for Rare. 



TROCHAMMINA TURBINATA (H. B. Brady). 



rUite 17, fig 2. 



naplophragm-iuvi tvrhlvolum H P.. Brady, Quart. .Tomn. ^licr. Sci.. vol. 21, 

 1881, p. 50; J^ep. Voy. Chalkhfjrr, Zoolopy. vol. 9, 1884, p 312, pi. 35, figs. 

 9, a-c— Egoer, AMi. Puy. Akad. Wiss Munrhen, vol 18. 1893. p 262, pi. 

 5, figs. 57-59. — CirAi'MAN', Proc. Zool. Soc. London, 1895, p. 16. 

 121802—20 



