20 LIST OF ILLUSTRATIONS. 



Pttge. 

 gradually assumiiit^ an irregnlai- form by the deA elupment of 

 }>roce8see and reentrants. 30, one arm of the bifid looth broad- 

 ening, 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 where the 

 sides have fused into the processes leaving a central aperture and 



six supplementary ones about it 435 



Fig. 34. QuinqKcloculina leriwhatica Heron-Allen and Earland, var. philippi- 

 nensis, new variety, apertural view. X 50. From Albatross 

 station D5164 439 



35,36. Triloculinn tricarinata d'Orbigny. 35, apertuml view of broad, pecu- 

 liarly shaped specimen. X 65. From Albatross station D5160. 

 36, apertural view of a much larger specimen where the outer 

 face has a double angle. X 35. From -4 Zfco^ross station D6236.. 454 

 37. Triloa.di'rM iricariiMta d'Orbigny. Apertural view^ X 50. From 



Albatross station D5236 456 



38-40. Flintina brudyana, new species. 38, specimen with simple bifid tooth. 

 X 100. From Albatross station D5141. 39, specimen in 

 later stage with broadened tooth. X 50. From Albatross sta- 

 tion D5164. 40, larger specimen with reduced costae, the last- 

 formed chamber smooth, the tooth sending out processes toward 

 the wall at the sides of the aperture. X 50 467 



41-44. Flintina bradyana, new species. X 50. From Albatross station 

 D5133. 41a, side view; b, apertural ^iew of young specimen 

 with simple tooth. 42, aperture of older specimen with bifid 

 tooth. 43, aperture of a still older specimen with the pro- 

 ceases of the tooth beginning to extend in and the opening to 

 have angles. 44, aperture of an adult where the arms have met 

 to form a central ring, additional arms extended from either 

 side of the aperture at the angles, and secondary arms being 

 given off on the sides of the ring 468 



45-47. Hihculina depressa d'Orbigny. 45, young specimen with elliptical 

 aperture and elongate tooth. X 50. From Albatross station 

 D5236. 46, later stage showing the greater elongation of the 

 aperture and tooth. X 100. From Albatross station D5201. 

 47, adult specimen with very narrow curved aperture, largely 

 occupied by the somewhat expanded tooth. X 40. From 



Albatross station D5236 469 



48. Biloculina sarsii Schlumberger. X 50. From Albatross station 

 D5220. a, front view; 6, side ^iew; c, apertural view of same 

 specimen 471 



49, 50. Biloculina sarsii Schlumberger. 49, aperture of early stage with a 

 broad, rounded tooth and an elliptical opening. X 80. From 

 Albatross station D5178. 50, aperture of an adult specimen 

 with very broad aperture, the tooth very narrow and elongate 

 with the angles produced at each end. X 100. From Albatross 

 station D5133 472 



51. Biloculina conata H. B. Brady. X 100. Apertiu-e of specimen from 



Albatross station D5236 477 



52, Biloculina comata H. B. Brady. Outline of the chambers of a par- 



tially broken specimen, showing the early quinqueloculine stage 

 with nearly smooth chambers. X 100. From Albatross station 

 D5236 478 



