FOKAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 209 



sutures deeply constricted, wall finely marked by longitudinal stria- 

 tions, aperture without a neck. 



Length up to 3 mm. 



Distribution. — Type specimen (U.S.N.M. No. 9117) from Alba- 

 tross station D5236, in 494 fathoms (903 meters), Pacific Ocean, east 

 coast of Mindanao, bottom temperature 41.2° F. (5.1° C). 



This species differs from N. i^erversa Schwager in its broader, shorter 

 chambers and its very much finer ornamentation, as M^ell as the 

 lack of a definite apertural neck and the mucronate character of 

 the proloculum. 



Nodosaria subperversa — Material examined. 



NODOSARIA LAEVICOSTATA Cnshman. 



Plate 37, fig. 4. 

 Nodosaria laevicostata Cushman, Proc. U. S. Nat. Mus., vol. 51, 1917, p. 656. 



Description. — Test elongate, arcuate, composed of but few cham- 

 bers, early ones more or less rounded, closely set, ornamented with 

 longitudinal costae, later chambers pyriform, with the last-formed 

 chamber often remote, wall smooth; apertural end tapering into an 

 apertural neck. 



Length up to 2 mm. 



Distribution. — Type specimens (U.S.N.M. No. 9118) from Alba- 

 tross station D5178, in 78 fathoms (143 meters), near Romblon. 



This is a peculiarly formed species, the early, close-set chambers 

 costate being nearly in a straight line, while the later smooth ones 

 are considerably angled. None of the specimens seen had more than 

 six chambers, the first three or four being close set and costate. 



Nodosaria laevicostata — Material examined. 



182152—21 14 



