FORAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 435 



QUINQUELOCULINA ALBATROSSI, new species. 



Plate 85, figs. ia-c. 



Description. — Test large, quinqueloculine througliout, elongate, 

 oval; in the young the chambers with rounded angles on the periph- 

 ery, later becoming convexly rounded, ornamentation consisting of 

 very numerous fine reticulations, regularly arranged in the young 

 specimens, the reticulations gradually being limited to the sides of 

 the chambers and the peripheral face becoming smooth, and finally 

 the entire chamber smooth; the reticulations show in places near the 

 inner margin or not at all; aperture rounded slightly, if at all, above 



Figs. 25-33.— QuiNQUELOcm-iNA albatrossi, new species. X 50. Various stages in the 



DEVELOPMENT OF THE APERTURAL CHARACTERS. 25, A SIMPLE TOOTH IN A GENERALLY 

 ROUNDED APERTURE. 26-29, A BIFID TOOTH, THE APERTURE GRADU.VLLY ASSUMING AN IR- 

 REGULAR FORM BY THE DEVELOPMENT OF PROCESSES AND REENTRANTS. 30, ONE ARM OF 

 THE BIFID TOOTH BROADENING, THE OTHER ALREADY JOINED TO THE SIDE OF THE APERTURE. 

 31, 32, STAGES IN THE BROADENING OF THE TOOTH AFTER THE CENTRAL OPENING IS ENTIRELY 

 SURROUNDED. 33, A LATER STAGE VraERE THE SIDES HAVE FUSED INTO THE PROCESSES 

 LEAVING A CENTRAL APERTURE AND SIX SUPPLEMENTARY ONES ABOUT IT. 



the base of the preceding chamber; the margin with a thickened lip, 

 and in the adult a bifid tooth. 



Length up to nearly 3 mm. 



Distribution. — Type specimen (Cat. No. 13877, U. S. N. M.) from 

 Albatross station Do 133, Sulu Sea, off western Mindanao, 38 fathoms 

 (70 meters). 



Specimens have been found in the material from the following gen- 

 eral localities: China Sea, off southern Luzon; Sulu Sea, off western 

 Mindanao, near Basiian Island, off Jolo, off Tawi Tawi; off Romblon; 

 off northern Cebu; off western Samar; Gulf of Davao; China Sea, 

 off Formosa; between Cebu and Bohol; between Samar and Leyte; 

 between Negros and Siquijor; Tara Island; and to the south at two 

 stations in Buton Strait. 



These stations range in depth from 18 to 500 fathoms (33 to 914 

 meters), the average 87.8 fathoms. Bottom temperatures are given 

 but for eight stations, ranging from 52.9° F. to 79.5° F. (11.6° C. to 



