FORAMIjSriFERA OF THE PHILIPPINE AND ADJACENT SEAS. 293 



GLOBIGERINA AEQUELATERALIS H. B. Brady. 



Cassidulina globulosa (part) Egger, Neues Jahrb. fur Min., 1857, p. 296, pi. 11, fig. 4. 



Globigerina aequilateralis H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 1879, p. 71; 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 605, pi. 80, figs. 18-21,— Cushman, 

 Bull. 71, U. S. Nat. Mus., pt. 4, 1914, p. 12, pi. 2, figs. 1-3; pi. 10, fig. 5. 



There seem to be two distinct forms of this species in the material 

 which I have examined — one, which may be taken as typical, in 

 which the development is planospiral, with the coiling so loose that 

 it is possible to see between the coils in side view, that is, the coils 

 are not really involute ; the other, the variety described below. Such 

 specimens are figured by Brady in the Challenger Report and may be 

 taken as the typical form of the species. 



This typical form was far less common than the following one, being 

 found at but 15 stations in the area, but well scattered: China Sea; 

 Sulu Sea; east coast of Luzon, etc., in the Pacific; Sibuko Bay, Bor- 

 neo; between Gillolo and 

 Makyan Islands; south of 

 Patiente Strait; off Bouro 

 Island, and at a very few 

 stations in the protected 

 waters of the Archipelago; 

 off Batangas Bay, between 

 Marinduque and Luzon; fig. ii.— globigerina aequilateralis, var. involuta cush- 

 and east of Masbate. The "^^- ^ '"■ "' ''°^ r^' ^' ^^'^ ^^^^'^'''''^ ^'''''^' 



^ C, APERTURAL VIEW. FROM STATION D5255. 



depth of these stations 



ranges from 26 to 569 fathoms (48 to 1,040 meters), with the average 

 depth 235 fathoms (430 meters). The bottom temperatures range 

 from 44.3° F. to 59° F. (6.8° C. to 15° C). 



Globigerina aequilateralis — Material examined. 



Locality. 



13 51 30 N. 



Island off 



Point, N. 



11 51 35 N. 



12 .52 00 N. 



13 3S 30 N. 

 13 42 00 N. 



13 29 40 N. 



12 44 42 N. 

 5 25 56 N. 

 4 10 SON. 

 07 00 N. 

 56 30 S.; 

 3 47 15 S.: 



14 20 23 N. 



13 59 20 N. 

 13 38 05 N. 



; 120 50 30 



Panabutan 

 15 W. 0.3 int. 



: 124 14 nOE... 



; 123 23 30 E... 



; 121 42 45 E... 



; 120 57 15 E... 



; 121 00 45 E... 



; 124 59 50 E... 



; 120 03 39 E... 



; 118 39 35 E... 



; 127 28 00 E... 



; 128 05 00 E... 



; 126 23 40 E... 



; 120 34 15 E... 



; 120 75 45 E... 

 120 33 00 E... 



Depth 



in 

 fath- 

 oms. 



1.59 

 26 



155 

 200 

 195 

 170 

 173 



277 

 310 

 230 

 569 

 517 

 28 

 135 

 464 



Bot- 

 tom 

 tem- 

 pera- 

 ture. 



56.6 

 50.2 

 52.8 



'hi'.h' 



44. 3 

 53.3 

 44.3 



59.0 

 48.5 



Character of 

 bottom. 



dk.Rn. m... 

 gn.m., s 



gn.m., s 



Rn.m 



s-,P 



fne. bk.s 



gii. m., s 



s 



gn.m., s 



gy.ra.jfne s 



co.s., m 



fne. ffy. s 



gy.m.,s.,sh 

 dk.gy.m... 

 gy.m.,s.... 



Abundance. 



Few. 

 Rare. 



Few. 

 Few. 

 Few. 

 Few. 

 Rare. 

 Rare. 

 Few. 

 Few. 

 Few. 

 Rare. 

 Few. 

 Few. 

 Few. 

 Few. 



