rOEAMINIFERA OF THE ATLANTIC OCEAN. 

 Cristellaria peregrina — material examined. 



115 



CRISTELLARIA CASSIS Fichtel and Moll? 



H. B. Brady, Parker, and Jones (Trans. Zool. Soc. London, vol. 

 12, 1888, p. 224, pi, 44, fig. 16) figure a broken specimen which they 

 refer to this species. It was from the Abrohlos Bank, 40 fath- 

 oms (73 meters), and shows a flattened test with the sutures orna- 

 mented by fine knobs. I have failed to find specimens of this charac- 

 ter in the Atlantic material I have examined. 



CRISTELLARIA CALCAR (Linnaeus). 



Plate 30, fig. 7; pi. 31, figs. 4, 5, 



"Nautilus minimus non umbilicatus" Gaultieri, Index Test., 1742, pi. 



19, fig. C. 

 "Nautili (Lenticulae radiatae)" Soldani, Testaceographia, vol. 1, pt. 1, 



1789, p. 54, pi. 33, figs, aa, hb. 

 Nautilus calcar Linnaeus, Syst. Nat, ed. 12, 1767, p. 1162, No. 272; 



(Gmelin's ed. 13, 1788, p. 3770, No. 2. 

 Cristellaria calcar PI. B. Brady (part), Rep. Voy. Challenger, Zoology, 



vol. 9, 1884, p. 55, pi. 70, figs. 9-12 (not figs. 13-15).— H. B. Brady, 



Pakker, and Jones, Trans. Zool. Soc. London, vol. 12, 1888, p. 224, 



pi. 44, fig. 14.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 318, pi. 



66, fig. 1 (part).- CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 3, 1913, p. 



72, pi. 32, fig. 4. 



Description. — Test close-coiled, biconvex, umbonate; chambers 

 comparatively few, usually only 5 or 6 in the last-formed coil, the 

 earlier ones often seen through the transparent umbilical region; 

 sutures distinct but not depressed, nearly straight; wall smooth, 

 periphery with a narrow carina, with a typically long acicular spine, 

 one from each chamber; aperture at the angle of the chamber, 

 radiate, slightly projecting. 



Diameter without spines about 1 millimeter. 



Distribution. — From a study of the various figures referred to 

 this species it will at once become evident that there are numerous 

 forms, varieties, and species included under this name. As it is 

 somewhat difficult to determine exactly what should be the type 

 of the Linnaean species, I have referred to it here specimens fitting 

 the above description, and similar to some of those figured by Brady 



