FORAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 405 



from 162 to 901 fathoms (297 to 1,648 meters), the average about 

 498 fathoms (911 meters). Bottom temperatures of three stations 

 range from 38.2° F. to 55.8° F. (3.4° to 13.2° C), \\dth the average 

 temperature 45° F. (7.2° C). Other localities are east coast of 

 Luzon; Darvel Bay and Sibuko Bay, Borneo; and off Bouro Island. 

 This species is close to S. rolusta H. B, Brady, ^rom which it dif- 

 fers mainly in the apertural form and characters. It may be that 

 the material referred to 8. robusta in the Indo-Pacific should belong 

 to S. validus, and Brady 's name be used only for the Atlantic material. 

 A study of this will later be made to see if this may not be the fact. 



Spiroloculina validus — Material examined. 



SPIROLOCULINA COSTIFERA Cushman. 



Plate 79, figs, la, b. 



Spiroloculina costifera Cushman, BiUl. 71, U. S. Nat. Miis., pt. 6, 1917, p. 34, pi. 6, 

 figs. 1-3. 



In the North Pacific this species was recorded from off Midway 

 and the Hawaiian Islands. The only Philippine material is from 

 Albatross station D5236, Pacific Ocean, off Mindanao, in 494 fathoms, 

 (903 meters). A single specimen here is referred to this species, 

 although the following variety is common. 



Spirolocutina costifera — Material examined. 



SPIROLOCULINA COSTIFERA Cushman, var. PLENA, new railetj. 



Plate 82, figs. 5-7. 



Description. — Variety differing from the typical in the smooth 

 walls, but with the same rounded form of chambers, excavate on 

 the inner margins, and very rounded periphery. 



