rOEAMINIFEKA OF THE ATLANTIC OCEAN. 



117 



sutures distinct, those of the early coiled portion with beads along 

 the sutures, decreasing in the later portion where they are often 

 depressed and unornamented ; wall between the sutures often beaded, 

 sometimes with longitudinal rows; aperture in the coiled portion 

 near the periphery, in specimens becoming uncoiled in the middle 

 of the end of the chamber, broad, radiate. 



Diameter up to 4 mm. 



Distribution.— Type-sitecimen (U.S.N.M. Cat. No. 18803) from 

 Albatross station D2377, in 210 fathoms (384 meters), in the north- 

 ern part of the Gulf of Mexico. This species was originally figured 

 by Goes in his paper on the Caribbean foraminifera, and later by 

 Flint from the Gulf of Mexico, 169-210 fathoms (309-384 meters). 

 I have had specimens from three stations, one identical with one of 

 those of Flint, -in the northern part of the Gulf of Mexico, one 

 off the coast of Georgia, and one off the Carolinas. 



This is a large beautiful species with its spinose margin and pecul- 

 iar ornamentation. The figure of Goes shows a senescent form in 

 which the last-formed chamber is much reduced in size and the 

 aperture broken. The species is apparently limited to the western 

 Atlantic in tropical and subtropical waters. 



Cristellaria antillea — material examined. 



CRISTELLARIA CREPIDULA (Fichtel and Moll). 



Plate 35, figs. 3, 4. 



Nautilus crepidula Fichtel and Moll, Test. Micr., 1803, p. 107, pi. 19, 



figs. g-i. 

 Cristellaria crepidula D'Orbigny, in De la Sagra, Hist Fis. Pol. Nat. Cuba, 



" Foraminiferes," 1S39, p. 64, pi. 8, fig.s. 17, 18.— H. B. Bkady, Rep. 



Voy. Challenger, Zoology, vol. 9, 1884, p. 542, pi, 67, figs. 17, 19, 20.— 



Goiss, Bull. Mus. Comp. Zool., vol. 29, 1896, p. 57.— Flint, Rep. U. S. 



Nat. Mus., 1897 (1899), p. 316, pi. 63, fig. 2.— Cushman, Bull. 71, U. S. 



Nat. Mus., pt. 3, 1913, p. 70, pi. 29, fig. 5, 6,[?] ; pi. 31, figs. 2-5.— 



Heeon-Allen and Eakland, Proc. Roy. Irish Acad., vol. 31, pt. 64, 



1913, p. 57. 



Description. — Test elongate, somewhat compressed, the early 

 chambers coiled, the later ones somewhat uncoiled; chambers com- 



