298 FORAMINIFERA 



from the ventral side; wall calcareous, perforate; aperture, a 

 narrow curved opening at the inner margin of the ventral face 

 of the last-formed chamber, often with a slightly upturned lip. 



Upper Cretaceous to Recent. 



See Cushman, The Genus Chilostomella and Related Genera 

 (Contr. Cushman Lab. Foram. Res., vol. 1, 1926, pp. 73-80, pi. 

 11). 



Genus CHILOSTOMELLOIDES Cushman, 1926 



Plate 45, figures 8-11; plate 46, figure 9 

 Genoholotype, Lagena (Obliquina) oviformis Sherborn and Chapman 

 Chilostomelloides Cushman, Contr, Cushman Lab. Foram. Res., vol. 1, 



1926, p. 77. 

 Lagena (Obliquina) Sherborn and Chapman, 1886 (not Seguenza). 

 Chilostomella (part) of authors. 



Test similar in general structure to Chilostomella, but the 

 aperture rounded and somewhat offset from the general contour 

 of the test, with a slight neck in some species and a slightly 

 developed lip. 



Upper Cretaceous and Lower Eocene. 



Subfamily 3. Seabrookiinae 



Test with two chambers forming a coil but entirely embracing 

 on the ventral side, the aperture elliptical and terminal. 



Genus SEABROOKIA H. B. Brady, 1890 



Plate 45, figures 12, 13; plate 46, figure 10 

 Genoholotype, SeabrooJda pellucida H. B. Brady 

 Seabrookia H. B. Brady, Journ. Roy. ?Iicr. Soc, 1890, p. 570. 

 Cerviciferiva Goddard and Jensen, Proc. Linn. Soc. N. S. Wales, vol. 32, 

 1907, p. 304 (genoholotype, Cerviciferin.a hilli Goddard and Jensen). 



Test essentially trochoid, the earliest stages as in 

 AUomovphina, three chambers making up a whorl, in the adult 

 two chambers involute, the last-formed one making up nearly the 

 whole surface of the test on the ventral side; wall calcareous, 

 thin, perforate; aperture elliptical at the periphery of the more 

 acute end of the chamber. 



Recent. 



