FOKAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 453 

 Triloculina trigonula — Material examined. 



TRILOCULINA TRIGONULA (Lamarck), var. MULTISTRIATA, new variety. 



Description. — Variety differing from the typical in having the 

 surface of the test with many jfine striae. 



Distribution. — ^Type specimen (Cat. No. 13810, U.S.N.M.) from 

 Albatross station D5236, Pacific Ocean, east coast of Mindanao, 494 

 fathoms (903 meters). 



This form has occurred only at this station. It seems to represent 

 a modified form of this species. 



Triloculina trigonula, var. multistriata — Material examined. 



TRILOCULINA ADVENA, new species. 



Description. — Test large, triangular, angles bluntly rounded, sides 

 slightly inflated; sutures distinct, surface smooth; aperture very 

 elongate, narrow, crescentiform, without a neck; tooth single, nar- 

 row, plate-like, nearly filling but not rising above the rim of the 

 aperture. 



Length of largest specunen about 2 mm. 



Distribution. — Type specimen (Cat. No. 13796, U.S.N.M.) from Alba- 

 ti'oss station D5438, west coast of Luzon, in 297 fathoms (543 meters).. 

 Other records of this species are: D5236, Pacific Ocean, east coast 

 of Mindanao, 494 fathoms (903 meters); D5331, off western Luzon, 

 178 fathoms (329 meters); and D5572, north of Tawi Tawi, in 334 

 fathoms (611 meters). Bottom temperatures of these stations 

 range from 41.2° F. to 54.7° F. (5.1°C. to 12.5° C). 



This differs from Triloculina trigo-nula in its aperture, which is 

 very elongate, and filled with a narrow thin lip. It is apparently 



