42 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



Genus EPONIDES Montfort, 1808 



Eponides Montfort, Conch. Syst., vol. 1, 1808, p. 127. — Cushman, Special 



Publ. No. 1, Cushman Lab. Foram. Res., 1928, p. 272. 

 Nautilus (part) of Authors. 

 Rotalia (part) of Authors. 

 Rotalina (part) of Authors. 



Pulvinulina Parker and Jones, in Carpenter, Parker, and Jones, Introd. 

 Foram., 1862, p. 201 (genotype, by designation. Nautilus repandus Fichtel 

 and Moll). 

 Placentula (part) Berthelin (not Lamarck). 



Cyclospira Eimer and Fickert, Zeitschr. Wiss. Zool., vol. 65, 1899, p. 702 

 (genoholotype, Rotalina schreibersii d'Orbigny). 

 Genoholotype. — Nautilus repandus Fichtel and Moll. 

 Test trochoid, usually biconvex, umbilical area closed but not 

 typically with a plug; wall calcareous, perforate; aperture, a low 

 opening between the periphery and umbilical area, usually well away 

 from the peripheral margin. 



The species of this genus are so numerous that they are here taken 

 up alphabetically for ease in reference. As a rule the umbilical area 

 is filled, but not showing a definite plug as in Rotalia. The aperture 

 is usually fairly small and well defined midway between the umbilicus 

 and periphery on the ventral side. 



EPONIDES ANTILLARUM (d'Orbigny) 



Plate 9, figures 2 a~c 



Rosalina antillarum d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba^ 



1839, "Foraminiferes," p. 75, pi. 5, figs. 4-6. 

 Truncaiulina antillarum Fornasini, Mem. Accad. Sci. Istit. Bologna, ser. 5, 



vol. 10, 1902, p. 63.— Cushman, Proc. U. S. Nat. Mus., vol. 59, 1921, p. 57, 



pi. 13, figs. 6-8; Publ. 311, Carnegie Instit. Washington, 1922, p. 48. 

 Pulvinulina incerata Cushman, Publ. 311, Carnegie Instit. Washington, 1922, 



p. 51, pi. 9, figs. 1-3; Publ. 344, 1926, p. 79. 



Test unequally biconvex, dorsal side somewhat more convex than 

 the ventral, periphery subacute; chambers numerous, 7 or 8 in the 

 last-formed coil; sutures oblique, rather indistinct and very slightly 

 if at all depressed on the dorsal side, nearly radiate and somewhat 

 depressed on the ventral side; wall fairly thick, finely punctate, other- 

 wise smooth, ventrally somewhat umbHicate, the apertural face of 

 the last-formed chamber obliquely angled; aperture elongate, at 

 the base of the last-formed chamber; color white. 



Diameter up to 1 mm. 



The young stage or perhaps the megalospheric form described and 

 figured by d'Orbigny becomes in the large microspheric form a test 

 with thick walls, more numerous chambers and a tendency for the 

 ends of the limbate sutures around the umbilical region to develop 

 a ring of beads, never more than one at the end of each suture, but 

 often growing to considerable size. This species seems to be a 

 characteristic one of the Florida region both at stations fairly close to 



