FORAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 231 



ture 50.5° F. (10.2° C); and D5590, in 310 fathoms (567 meters), 

 Sibuko Bay, Borneo, bottom temperature 44.3° F. (6.8° C). 



The variety was described from Albatross station D4900 off south- 

 ern Japan, a station with a bottom temperature of 52.9° F. (11.6° C), 

 where numerous species of the Philippine region seem to reach their 

 northern limit. 



Cristellana tricarinella, var. spinipes — Material examined. 



CRISTELLARIA CALCAR (Linnaeus). 



Plate 45, figs. 2a, b. 



"Nautilus minimus non umbilicatus " Gaultieri, Index Test., 1742, pi. 19, fig. C. 

 "Nautili (Lenticulse radiatse)" Soldani, Testaceographia, vol. 1, pt. 1, 1789, 



p. 54, pi. 33, figs, aa, bb. 

 Nautilm calcar Linnaeus, Syst. Nat., ed. 12, 1767, p. 1162, No. 272; (Gmelin's) 



ed. 13, 1788, p. 3370, No. 2. 

 Robulina calcar d'Orbigny, Foram. Foss. Vienna, 1846, p. 99, pi. 4, figs. 18-20. 

 Cristellaria calcar Parker and Jones, Ann. Mag. Nat. Hist., ser. 2, vol. 19, 1857, 



p. 289, pi. 10, figs. 10-12.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 



1884, p. 551, pi. 70, figs. 9-12 (not 13-15).— Cushman, Bull. 71, U. S. Nat. 



Mus., pt. 3, 1913, p. 72, pi. 32, fig. 4. 



The great mass of material of Cristellana which has been obtained 

 from the Philippine material has made possible the demarcation of 

 various species and the segregation of new fonns with a much surer 

 basis than would be the case with a few specimens. The abundance 

 of specimens has resulted almost invariably in the clearness of lines 

 of separation rather than in the obliteration of such lines. This has 

 been the case here and the species C. calcar has been restricted to the 

 test, comparatively small in size, with a few chambers in each whorl 

 and with long acicular spines, one to each chamber, radially placed 

 on the periphery, the peripheral carina being very narrow. 



Such a test as described above occurred in more or less numbers 

 in material from a number of stations in the area. Most of these 

 stations are in the Philippine Archipelago proper, but a few are out- 

 side in the China Sea off Formosa, and off Sibuko Bay, Borneo. In 

 the restricted Philippine area it has occurred off the east coast of 

 Mindoro; Sogod Bay, southern Leyte; east of Masbate; between 

 Marinduque and Luzon; between Siquijor and Bohol; and especially 

 at various stations about Marinduque. 



