FORAMINIFERA OF THE ATLANTIC OCEAN. 

 Tholosina bulla — material examined. 



65 



THOLOSINA VESICULARIS (H. B. Brady). 



Placopsilina vesicularPi H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 1879, p. 51, 



pi. 5, fig. 2; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 316, pi. 35, figs. 



18, 19. — Heron-Allen and Earland, Proc. Roy. Irish Acad., vol. 31, 



pt. 04, 1913, p. 47. 

 Tholosina vesicularis HHViiBhBR, Arch.Prot., vol. 3, 1903, p. 227, fig. 53 (in text). — 



AwERiNZEW, Mem. .\cad. Imp. Sci. St. Petersburg, ser. 8, vol. 29, No. 3, 



1911, p. 8. 



Description. — Test attached, lower side flattened or conforming 

 to the surface to which it is attached, more or less irregular but in 

 general a convex, low arching, subcircular chamber with the borders 

 extending out into simple or branching generally tubular extensions 

 for the pseudopodia, no other openings apparent; wall composed of 

 sand grains embedded in an excess of cement, the grains usually 

 angular and scattered so that they are separate from one another, 

 surface smooth both without and within; chambers sometimes con- 

 nected by the pseudopodal extensions or often crowded together, 

 appearing to be a fusion or accidental placement rather than a direct 

 association of several chambers of one individual; color light gray. 



Diameter, up to 3 or 4 mm. without the pseudopodal extensions. 



Distribution. — The material described by Brady came from three 

 Porcupine stations between the northwest of Ireland and the llockall 

 Bank, depths 630, 1,215, and 1,443 fathoms. Beside these the Chal- 

 lenger obtained it east of Buenos Aires in 1,900 fathoms. 



Awerinzew gives tlie following stations in the Siberian Arctic: 

 North of New Siberian Islands, 38 meters, 77° 20' 30" N. ; 138° 47' E. ; 

 in 35 meters, 77° 10' N.; 142° 48' E.; and near Bennett Island, 42 

 meters, 76° 37' N.; 147° 27' E. These, it will be noted, are in cold, 

 shallow water. 



