FORAMINIFERA OF THE ATLANTIC OCEAN. 

 Marginulina bacheii, var. ensiformis — material examined. 



131 



MARGINULINA STRIATULA Cushman. 



Plate 37, fig. 4. 



Marginulina striatula Cushman, Bull. 71, U. S. Nat. Mus., pt. 3, 1913, 

 p. 79, pi. 23, fig. 4; Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 255, 

 pi. 41, fig. 2. 



Description. — Test elongate, early part forming a portion of a 

 coil, later chambers moniliform, tumid, separated by deep constric- 

 tions; wall typically with numerous very fine longitudinal striae; 

 aperture at the end of a well-developed neck, eccentric on the dorsal 

 side, radiate. 



Length nearly 2 mm. 



Distribution. — I originally described this species from a single 

 Ne?'o station, 2071, in 271 fathoms (496 meters), off the Hawaiian 

 Islands. I have since had it from three stations in the Philippine 

 region, ranging in depth from 78-554 fathoms (143-1012 meters). 

 I have specimens from the Gulf of Mexico and Caribbean Sea which 

 may be referred to this species; the Atlantic stations range from 

 169-683 fathoms (309-1,248 meters), but the species is rare at all 

 the stations. It has not hitherto been recorded in the Atlantic. 



This is another one of the examples of a species occurring in the 

 Gulf of Mexico and Caribbean which has its range westward across 

 the tropical Pacific. 



Marginulina striatula — material examined. 



