70 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



GAUDRYINA ATLANTICA (Bailey). 

 Plate 13, figs. 1-3. 



Textularia atlantica Bailey, Smithsonian Contrib., vol. 2, art. 3, 1851, p. 12, 



pi., figs. 38-43. 

 Gaudryina rugosa Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 288, pi. 33, fig. 3. 

 Verneuilina triquetra Goeb (not Miinster), Bull. Mus. Comp. Zool., vol. 29, 1896, 



p. 38. 



Descriiyiion. — Test elongate, triangular in section, the angles acute, 

 triserial portion short, biserial portion mostly triangular, the last- 

 formed one or two chambers often rounded, tapering gradually from 

 the blunt initial end to the broadly rounded apertural end; chambers 

 distinct, not inflated; sutures distinct throughout, wall coarsely 

 arenaceous, of angular sand grains with a large proportion of whitish 

 cement, surface rather smoothly finished; aperture elongate, slightly 

 arched, in a deep reentrant of the ventral inner border of the chamber; 

 color light gray. 



Length up to 4 and 5 mm., usually less. 



Distribution.— ^QjiXqj described this species from a station in 89 

 fathoms (162 meters), latitude 39° 31' N., longitude 72° 11' 20" W. 

 At this station this species "is particularly abundant." Specimens 

 of this species are abundant at a group of Albatross stations off the 

 northeastern coast of the United States in the immediate vicinity of 

 the type station given by Bailey, and at one other station off Cape 

 Hatteras. At some of these Albatross stations this species was very 

 abundant. This differs from G. rugosa d'Orbigny, as a reference to 

 his figures will show.^^ 



Gaudryina atlantica — material examined. 



i« Mem. Soc. Geol. France, vol. 4, 1840, pi. 4, flgs. 20, 21. 



