78 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



The species may have been recorded from the West Indies under 

 Amphistegina. 



It is probable that d'Orbigny's Asterigerina lobata from the coast 

 of Cuba is a form of this species in which the keel was not well 

 developed. His A. monticula from the coast of South America is 

 also closely related if not identical. 



Asterigerina carinata — Material examined 



Genus AMPHISTEGINA d'Orbigny, 1826 



Amphistegina d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 304. — H. B. Brady, 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 739. — Chapman, The 

 Foraminifera, 1902, p. 239.— Cushman, Bull. 71, U. S. Nat. Mus., pt. 4, 

 1914, p. 35; Smithsonian Misc. Coll., vol. 77, No. 4, 1925, p. 49; Special 

 Publ. No. 1, Cushman Lab. Foram. Res., 1928, p. 281. 

 Omphalophacus Ehrenberg, Abhandl. k. Akad. Wiss. Berlin, 1838, p. 132 

 (genoholotype, Omphalophacus hemprichii Ehrenberg). 

 Genotype, by designation. — Amphistegina lessonii d'Orbigny. 

 Test usually lenticular, trochoid, often involute on the dorsal side 

 in the adult; supplementary chambers more or less irregularly rhom- 

 boid; sutures and chambers with a pronounced angle, no true second- 



