FORAMINIFERA OF THE ATLANTIC OCEAN 



21 



ment of spines from one to three, two being the usual number on the 

 adult chamber. It is recorded from the Clare Island region of Ireland; 

 west of Scotland and South Cornwall. Sidebottom records it from 

 off Australia, but his figure seems to show a keeled specimen rather 

 than one with broadly rounded periphery. 



DISCORBIS CONCINNA H. B. Brady (?) 



This species originally described from the Indo-Pacific and appar- 

 ently from later records limited to that faunal region, has been 

 recorded from the Atlantic off the Cape Verde Islands by Egger *", 

 and by Hof ker ^^ from the coast of Holland. Hofker's figures are not at 

 all like the few chambered species of Brady, and so it is very unlikely 

 that D. concinna really occurs as an Atlantic species. 



DISCORBIS FLORIDANA Cushman 



Plate 4, figures 7, 8 



Discorbis floridana Cushman, Publ. 311, Carnegie Instit. Washington, 1922, 

 p. 39, pi. 5, figs. 11, 12. 



Test rotaliform, periphery slightly, if at all, lobulated, dorsal side 

 rounded, much convex, ventral side concave, somewhat umbilicate; 

 chambers comparatively few, five or six in the last-formed coil, on 

 the dorsal side coarsely punctate, on the ventral side punctate near 

 the periphery, but on the inner concave portion smooth, with very 

 fine punctae, if any; sutures in the younger portion slightly limbate, 

 those of the later portion not limbate, rather indistinct, very slightly 

 depressed; aperture an elongate, arched opening at the base of the 

 last-formed chamber, opening on the umbilicate area, often with a 

 slight, thin lip; color of the early whorls brown, of the last whorl 

 white. 



Diameter not exceeding 0.4 mm. 



I 



Discorbis floridana — Material examined 



»J Abhandl. kon. bay. Akad. Wiss. Munchen, CI. II, vol. 18, 1893, p. 388, pi. 15, figs. 22-24. 

 i« Flora en Fauna des Zuiderzee, Protozoa, 1922, p. 153, fig. 51 (in text). 



