294 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



GLOBIGERINA AEQUILATERALIS H. B. Brady, var. INVOLIjTA Cu.shroan. 



Globigerina aequilateralis H. B. Brady, var. involuta Cushman, Proc. U. S. Nat 

 Mu3., vol. 51, 1917, p. 602. 



Description. — Variety differing from the typical in being much more 

 closely coiled, although planospiral, the last-formed coil decidedly 

 overlapping the previous coils in side view; visible aperture instead 

 of semicircular in the typical in the much broader; whole test less 

 delicately formed. 



Distriiution. — Type specimen (U.S.N.M. No. 9147) from Alba- 

 tross station D5236, in 494 fathoms (903 meters), Pacific Ocean, off 

 eastern coast of Mindanao, bottom temperature, 41.2° F. (5.1° C). 

 This variety has occurred at 56 other stations well distributed over 

 the area from northern Luzon and the China Sea through the Archi- 

 pelago, Sulu Sea to Flores Sea. The depths range from 22 to 1,570 

 fathoms (40 to 2,871 meters), with an average of 359 fathoms (656 

 meters), the average bottom temperature being 51.4° F. (10.8° C). 



This variety has been distinctive in this mass of material and it 

 seems worthy of separation. 



Globiaerina aequilateralis, var. involuta — Material examined. 



Cat. 

 No. 



Coll. of- 



No.of 

 speci- 

 mens 



Station. 



Locality. 



Depth 



in 

 fath- 

 oms. 



Bot- 

 tom 

 tem- 

 pera- 

 turo. 



Character of 

 bottom. 



Abundance. 



14384 

 14385 



U.S.N.M. 

 a.S.N.M. 



9147 



14387 



U.S.N.M. 



U.S.N.M. 



14386 



U.S.N.M. 



D5100. 



D5106. 



r>.5112. 



D5121. 



D5128. 



D5146. 



D5153. 



D5172. 



D5179 



D51S4. 



D5187 



D.-il^ig. 



D5191. 



D5192. 



D5201. 



D5203, 



D5213. 



D5214. 



D5215. 



D5217. 



D.';220. 



D5238. 



D5243. 



D5255. 



D5259. 



D526n. 



D5261. 



D5281. 



D52S2. 



DS300. 



P5315. 



r5338. 



D5342. 



D5349. 



©5374. 



D53S1. 



D5430. 



D5445 



D5467. 



D5523. 



D5S26. 



D5529. 



1)5533. 



14 17 15 N, 

 14 23 55 N. 

 13 48 22 N. 

 13 27 20 N. 

 10 34 45 N. 

 5 46 40 N. 



5 18 10 N. 



6 03 15 N. 

 12 38 15 N. 



10 18 30 N. 

 9 16 45 N. 



[ 9 56 30 N. 



11 09 15 N. 



10 lOOON. 

 9 58 00 N. 



12 15 00 N. 

 12 25 18 N. 



12 31 30 N. 



13 20 00 N. 

 13 38 00 N. 



8 50 45 N. 

 fl 50 55 N. 



7 03 00 N. 



11 57 30 N. 



12 25 35 N. 



12 30 55 N. 



13 52 45 N. 

 13 53 00 N. 



20 31 00 N. 



21 40 00 N. 



11 33 45 N. 

 10 56 55 N. 

 10 54 00 N. 

 13 46 45 N. 

 13 14 15 N. 



9 49 40 N. 



12 44 42 N. 



13 35 27 N. 



8 48 44 N. 



9 12 45 N. 

 9 23 45 N. 

 9 08 15 N. 



120 32 40 E.. . 

 120 32 33 E.., 



120 47 25 E... 



121 17 45 E... 



121 47 30 E... 

 120 48 50 E... 

 120 02 55 E... 



120 35 30 E... 



122 12 30E... 



122 23 30 E... 



123 21 15 E... 



123 15 00 E... 



123 50 00 E... 

 125 04 15 E... 



125 07 40 E... 

 123 57 30 E... 

 123 37 15 E... 

 123 35 24 E... 



123 14 15 E... 



121 58 00 E... 



126 26 52 E... 

 126 14 35 E... 

 125 39 00 E... 

 121 42 15 E... 

 121 31 35 E... 

 121 34 24 E... 

 120 25 00 E... 



120 26 45 E... 



115 49 00 E... 



116 £8 00 E... 

 119 24 45 E... 

 119 17 24 E... 



118 26 20 E... 



121 35 OS E... 



122 44 25 E... 



119 03 20 E... 



124 59 50 E... 



123 37 18 E... 

 123 27 35 E... 

 123 45 30 E... 

 123 39 30 E... 

 123 23 20 E... 



35 



37 



177 



108 



742 



24 



49 



318 



37 



665 



638 



225 



32 

 554 

 775 



80 

 218 

 604 

 105 



60 

 494 

 218 

 100 

 312 

 234 

 145 

 201 

 248 

 265 

 148 



43 

 145 

 730 

 190 



88 

 464 

 383 



'F. 



52.4 

 '49.' 5 



75.7 

 49.8 

 49.8 



53.6 



52.8 

 52.9 



"5i.'4 

 60.5 

 63.1 



■4i.'2 

 63.6 



sy.s 



gy-m 



dk.gn.ra... 

 dk.gn.m... 

 sft.gn.m... 



co.s., sh 



co-s., sh 



fne.s., sh... 



hrd.s 



KH.m 



gn.m 



49.3 

 51.4 



50.4 

 47.4 



54.4 



40.6 



50.0 

 44.3 



sft.gn.m... 



en.s 



gy.s., m.... 



gn.m....... 



s., m.,sh... 



gn.m 



gn.m 



crs.gy.s 



sft.gn.m... 

 fne. gy.s — 



gym 



sft.m 



gy.m.,glob. 

 g.,m.,s.... 



s., m 



dk.gy.s 



dk.gy.s.... 

 gy.m.,s.... 



s.,sh 



co.s.,m.... 



gym 



co.s 



gym 



co.s 



giob. oz 



gn.m., s 



gym 



805 

 441 

 256 



52.3 

 53.0 

 .5.3.3 



gn.m., glob, 

 gy.m., glob, 

 gn. m., s.... 



Few. 



Rare. 



Frequent. 



Pew. 



Frequent. 



Few . 



Few. 



Few. 



Few. 



Few. 



Few. 



Frequent. 



Few. 



Frequent. 



Few. 



Few. 



Few. 



Few. 



Few. 



Few. 



Few. 



Few. 



Few. 



Few. 



Few. 



Few. 



Few, 



Few. 



Few. 



Rare. 



Rare. 



Rare. 



Few. 



Few. 



Few. 



Rare. 



Rare. 



Few. 



Rare. 



Few. 



Few. 



Few. 



