FORAMINIFERA OF THE ATKOTTIC OCEAN. 



43 



Description. — Test much elongate, straight or shghtly curved, 

 the apical end bluntly pointed, tapering very gradually to the aper- 

 tural end; chambers numerous, somewhat compressed, the sutures 

 slightly depressed, the chambers increasing in height as added; 

 wall smooth, conspicuously but finely punctate; aperture an elon- 

 gated slit, widest at the inner end; color white, brownish when 

 living. 



Length 0.40-0.85 mm. 



Distribution. — This species, if one believes the figures referred to 

 it, is very variable and is very widely distributed. It seems to be 

 one of those species to which almost any elongate, slightly com- 

 pressed, smooth form of Bolivina is referred. 



In the western Atlantic material forms which can be definitely 

 referred to d'Orbigny's species are comparatively rare. They are 

 found at a few stations on the southeast coast of the United States 

 south of Cape Hatteras, in the Gulf of Mexico, and the Caribbean. 

 Brady gives a number of stations well scattered from off Bermuda, 

 off the West Indies, off the Azores, off Brazil, and in deeper water 

 in the mid-Atlantic. There are numerous records of its occurrence 

 in European waters. 



Bolivina punctata — material examined. 



BOLIVINA STRIATULA Cushman. 



Bolivina striatula Cushman, Publ. 311, Carnegie Inst. Wash., 1922, p. 27, pi. 3, 

 fig. 10. 



Description. — Test elongate, gradually tapering from the somewhat 

 rounded initial end to the broad apertural end; chambers numerous, 

 distinct, slightly inflated; sutures very slightl}^ depressed; early por- 

 tion of the test less compressed than the adult, the peripheral margin 

 rounded in the young, sharply angled in the adult, early portion of 

 the test with numerous longitudinal striations occupying about half 

 the length of the test, following the chambers with a very fine reticu- 

 late pattern, the final chambers being smooth, hardly punctate. 



Length 0.35 mm. 



This species is peculiar in the three different stages of ornamenta- 

 tion and the development of the test. The early portion is more or 



