FORAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 403 

 SPIROLOCULINA CIRCULAKIS, new species. 



Plate 80, figs. 1, 2. 



Description. — Test circular in face view, composed of a large num- 

 ber of chambers, narrow in face view; sides concave; periphery 

 slightly convex, broad, last-formed chaml)er only projecting a little 

 beyond the general circular contour of the whole test; sutures flush 

 with the surface, l)ut of clear shell material makmg them stand out 

 as darker lines; apcrtural end with a broad, low aperture, the edges 

 being slightly thickened and with a low tooth; surface smooth and 

 polished. 



Diameter up to 1.5 mm. 



Distribution. — ^Type specimen (Cat. No. 10897, U. S. N. M.) from 

 Albatross station D5259, off northwestern Panay, in 312 fathoms (571 

 meters), bottom temperature 49.3° F. (9.6° C). 



This is a beautiful species frequent at this station. Its circular 

 shape, concave sides, broad periphery, sutures forming a series of 

 concentric circles with the two zigzag lines when the chambers meet; 

 very broad low chambers and aperture, and the surface smooth and 

 poUshed, should easily distinguish this species. It was found no- 

 where else in the region, yet is frequent in the material from this one 

 station. 



Spiroloculina circular is — Material examined. 



SPIROLOCULINA ORBIS, new species. 



Plate 83, fig. 3. 



Description. — Test subcircular in front view, thick, the periphery 

 squarely truncate; chambers rather few; sides flat, except near the 

 periphery, when there is a slight thickening; ends of the final chamber 

 slightly extended, apertural end with a short neck and rounded 

 aperture with a very slight collar-like lip ; surface smooth but dull. 



Length usually less than 1 mm. 



Distribution. — Type specimen (Cat. No. 10951, U.S.N.M.) from 

 Albatross station 1)5178, off Romblon, in 78 fathoms (143 meters), 

 where it is frequent. The specimens show very little variation of 

 any sort. It was also found in material from D5179, off Romblon, in 

 37 fathoms (68 meters) ; D5269, Verde Island Passage, in 220 fathoms 

 (403 meters); and D5277, China Sea, off southern Luzon, in 80 

 fathoms (146 meters). 



