82 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



Ti-ochammina turbinatum Eimeu and Ftckert, Zeitschr. Wi.ss. Zool., vol. 65. 



1899, p. 695.— CfJsriMAN, Bull. 71, U. S. Nat. Mus., pt. 1. 1910, p. 122, fig. 



189.— Pearcey, Tnvns. Poy. Poo. E(linl>iiro:h. vol. 49, 1914, j). 1011. 

 JfapJnphragmium ohsolcfum Goes, lUill. Mus. Comp. Zool., vol. 29. 1896, p. 31. 



pi. ?>. figs. 14-16. 



iJi'sciipiion. — Test s])iritl, early ])ortion regular, low sj)ire(l, last- 

 formed volution iu the adult soniewJiat irregular and becoming 

 oblique; live to eight chambers in the last-formed volution, umbili- 

 cate below, in adults with a de])ression above due to tlie obli^iuity of 

 the last-formed volution; wall arciiaceous, variable in coarseness 

 and amount of cement; aperture a narrow curved slit at the base of 

 the ventral side of tlie cluimber; color yello^^'ish or reddish b^ow^l 

 or gray. 



Diameter 0.75-1.50 mm. 



Distr'dmtion. — The original Challenger records included ])ut one 

 Atlantic station, 346 in 2,350 fatiioms (4,298 meters) just south of 

 the equator off the west coast of Africa. Later CJiallenger records 

 include stations 44 in 1,240 fathoms (2,208 meters) off tlie northeast 

 coast of the United" States, 323 in 1,900 fathoms (3,475 meters) ofl' 

 Buenos Aires, and 348 near tJie fust station in 2,450 ftUhoms (4,481 

 meters). There are also two stations 142 and 143 off the Cape of 

 Good Hope. Pearcey records it from the South Atlantic and Ant- 

 arctic in 2,103 and 2,500 fathoms (3,846 and 4,572 meters). 



The Albatross material has this s])ecies from numerous stations 

 from the northeastern coast of the United States and the Gulf of 

 Mexico a few of the stations in comparatively shallow water but 

 hpJf of them average more tlian 1,500 fathoms (2,743 meters). 

 Ex«mination of the Goes collection shows Ilavlophragmmm ohsolcium 

 Goes is really T. tuvhinatum although the figures are somewhat 

 conven tionalized. 



Trochammina turbinaia — mmerial examined. 



Loialitv. 



37 12 22 N. 



38 ;-3 00 N. 



39 22 50 N. 

 39 58 50 N.: 

 37 56 20 N. 

 23 10 31 N. 

 39 05 30 N. 

 39 03 15 N. 



37 38 40 N. 



38 29 00 N. 

 29 15 30N. 



39 44 SON. 

 39 15 30 N. 

 39 43 tON. 



74 20 04 W. 



69 23 30 W. 

 68 25 Oa W . 



70 39 40 W . 

 70 c7 30 W . 

 82 20 37 W . 

 70 44 30 W . 

 70 r.O 45 W . 

 73 16 30 W. 

 73 09 00 W . 

 85 29 30 W. 



70 30 45 W. 



71 25 00 W . 

 71 34 00 W. 



epthj 



in 

 fath- 

 oms. 



788 

 1,731 

 1,608 



168 

 1, 917 



167 

 1,525 

 1,537 

 l,i23 



965 



27 



1,0S1 



1, 434 



31:4 



Brt- 

 tom 

 tem- 

 pera- 

 ture. 



3 i. 9 

 3'). 9 

 37.7 

 36.8 



38 5 

 37.3. 



Charartcrof 

 bottom. 



bii . m . . . 

 s?lob. 01. 

 iilob. oz. 

 g-.s.... 

 i.'lob. oz . 



to 



g/. oz... 

 py. oz... 

 giob. oz. 

 g.v.oz... 



br.m. . . 

 g.v. oz... 

 gii. m. .. 



Abundan-.*. 



Common. 



Rare. 



Rare. 



Rare. 



lew. 



Few. 



lew, 



1 ew. 



Rare. 



Rare. 



Rare. 



Rare. 



Rare. 



Rare. 



