102 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



Cristellaria orbicularis? — material examined. 



CRISTELLARIA D'ORBIGNII (Bailey). 



Plate 22, fig. 1 ; pi. 26, fig. 3. 



Robulina d'orhignii Bailey, Smithsonian Contrib., vol. 2, 1851, p. 10, pi., 

 figs. 9, 10. 



Description. — Test close-coiled, compressed, periphery with a 

 slight blunt keel; chambers comparatively few, 8-10 in the last- 

 formed coil, distinct, but very slightly inflated, often more so toward 

 the later chambers; sutures distinct, very slightly if at all de- 

 pressed, straight, generally radiate, apertural face truncated, the 

 sides somewhat thickened and keeled; aperture at the peripheral 

 angle, radiate, only slightly projecting; surface smooth. 



Diameter up to 4 mm. 



Distribution. — This species was originally described and figured 

 by Bailey from dredgings off the northeastern coast of the United 

 States, in the same region from which much of the Albatross dredg- 

 ings used in the present paper were obtained. It somewhat resem- 

 bles Cristellwia occidentalis Cushman, but has a more rounded form, 

 is larger, and its general appearance very different. The stations 

 range from the latitude of Cape Cod southward nearly to Cape 

 Hatteras. Specimens are not nearly so abundant as are those of 

 Cristellaria occidentalis. 



Cristellaria d^orhignii — matei'ial examined. 



CBISTELLARIA OCCIDENTALIS. new species. 



Plate 25, fig. 2 ; pi. 2G, figs. 1, 2. 



Cristellaria reniformis Flint (part) (not D'Orbigny), Rep. U. S. Nat. Mus., 

 1897 (1899), p. 315, pi. G2, fig. 2. 



Description. — Test for the most part close-coiled, compressed, 

 composed of comparatively few chambers, 6-8 in the last- formed coil, 



