FORAMINIFEKA OF THE PHILIPPINE AND ADJACENT SEAS, 239 



CRISTELLARIA GEMMATA H. B. Brady. 



Cristellaria gemmata H. B. Brady, Quart. Journ. Micr. Soc, vol. 21, 1881, p. 64; 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 554, pi. 71, figs. 6, 7. — Cushman, 

 Bull. 71, U. S. Nat. Mus., pt. 3, 1913, p. 75, pi. 34, fig. 7. 



Brady describes this species from three Indo-Pacific stations of 

 the Challenger, one of which was in the Philippines at a depth of 95 

 fathoms (174 meters). 



Apparently this is a rather limited species, as it does not seem to 

 occur or to be noted outside this region. I have had excellent ma- 

 terial from several stations in the Philippines; China Sea off southern 

 Luzon; between Marinduque and Luzon; off southeastern Mindoro; 

 off Marinduque, it being especially well distributed. The 10 stations 

 range in depth from 106 to 340 fathoms (194 to 622 meters), with 

 the average 198 fathoms (363 meters). The average bottom tem- 

 perature where given was 52.5° F. (11.3° C). 



Cristellaria gemnmta — Material examined. 



CRISTELLARIA COSTATA (Fichtel and Moll). 



Plate 46, fig. 4; plate 47, fig. 1. 



Nautilus costatus Fichtel and Moll, Test. Micr., 1803, p. 47, pi. 4, figs. g-i. 

 Spincterules costotits Montfort, Conch. Syst., 1808, p. 222, 56'' genr. 

 Lenticulina costata Defrance, Diet. Sci. Nat., vol. 32, 1824, p. 182. 

 Robulina costata d'Orbiony, Ann. Sci. Nat., vol. 7, 1826, p. 289, No. 13 [?]. 

 Cristellaria costata Parker and Jones, Ann. Mag. Nat. Hist., eer. 3, vol. 5, 1860, 



p. 113, No. 19.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 



555, pi. 71, fig. 8 (not fig. 9).— Cushman, Bull. 71, U. S. Nat. Mua., pt. 3, 1913, 



p. 75, pi. 34, fig. 4. 



Distribution. — This species with its attendant variations is one of 

 the most striking constituents of the foraminiferal fauna of this area. 

 With large suites of specimens it has been found possible to split the 

 various forms into a typical form, v/ith three varieties according to 

 the trend which the variation develops. These varieties, while they 

 seem almost like separate species, can be connected with one another 

 and are really different modifications of the same type of ornamented 

 test. 



