238 CRETACEOUS PALEONTOLOGY. 



1900. Cristellaria cassis Chapman, Proc. California Acad. Sci., 



ser 3, vol. i, p. 250, pi. xxix, fig. 18. 

 1905. Cristellaria cassis Bagg, Bull. U. S. G. S., No. 268, p. 35, 



pi. 6, fig. 2. 



Description. "Test very large, complanate, elongate oval r 

 distinctly carinate; chambers irregular, 16 to 15 in final volution; 

 septa distinct, arcuate, depressed ; aperture oval with crenulated 

 margin. 



"Length, 4.3-4.56 mm.; breadth, 3-4 mm." (Bagg.) 



Formation and locality. Vincentown limesand, Vincentown. 

 Brownsville, New Egypt, etc. (Bagg.) 



Geographic distribution. New Jersey ; Miocene of California. 



Cristellaria crepidula (Fichtel and Moll). 

 Plate II., Figs. 41-42. 



1803. Nautilus crepidula Fichtel and Moll, Test. Microsc., p, 



107, pi. xix, figs. g-i. 

 1839. Cristellaria crepidula d'Orbigny, Foram. Cuba, p. 64, pi. 



viii, figs. 17, 1 8. 

 1865. Cfestettafia crepidula Parker and Jones, Philos Trans., 



vol. 155, p. 344, pi. xiii, figs. 15, 16, pi. xvi, fig. 4. 

 1884. Cristellaria crepidula Brady, Challenger Report, vol. 9,. 



pp. 542, 543, pi. Ixvii, figs. 17, 19, 20; pi. Ixviii, figs. 



I, 2. 



1898, Cristellaria crepidula Bagg, Bull. U. S. Geol. Survey No, 



88, P- 55- 

 1905. Cristellaria crepidula Bagg, Bull. U. S. G. S., No. 268,, 



p. 35, pi. 6, fig. 3. 



Description. "Test elongate, arcuate, smooth, compressed,, 

 pellucid; chambers 10 to 12, oblique, separated by slightly con- 

 vex walls; posterior chambers involute, anterior chambers evo- 

 lute; aperture rotund, slightly crenate. 



"Length, 0.7 mm.; breadth, 0.26 mm." (Bagg.) 

 Remarks. "The above form is not a common species. Our 

 specimens are similar in shape to Cristellaria intermedia Reuss, 



