FAMILY 33. ROTALIIDAE 279 



Genus SIPHONINELLA Cushman, 1927 



Plate 40, figures 9, 10; plate 41, figure 13 

 Genoholotype, Truncatulina soluta H. B. Brady 

 Siphoninella Cushman, Contr. Cushman Lab, Foram. Res., vol. 3, 1927, 



p. 77. 

 Truncatulina H. B. Brady, 1881 (not d'Orbigny). 



Test in the early stages similar to Siphonina, in the later 

 development with the chambers becoming uncoiled; wall cal- 

 careous, perforate ; aperture in the adult terminal, elliptical, with 

 a neck and lip. 



Eocene to Recent. 



Subfamily 6. Baggininae 



Test generally biconvex, the umbilical area closed, the area 

 adjacent to it on each chamber with a thinner, rounded, clear 

 area, usually without perforations; aperture at the base of the 

 ventral margin of the chamber. 



Genus CANCRIS Montfort, 1808 

 Plate 40, figure 14; plate 41, figure 14 

 Genoholotype, Nautilus auriculus Fichtel and Moll 

 Cancris Montfort, Conch. Syst., vol. 1, 1808, p. 267. 

 Nautilus (part) Fichtel and Moll, 1798 (not Linne). 

 Rotalina (part) Williamson, 1858 (not d'Orbigny). 

 Pulvimdina (part) of authors. 



Test trochoid, nearly equally biconvex, compressed ; chambers 

 few, rapidly enlarging as added; wall calcareous, perforate; 

 umbilical area with a clear plate of rather large dimensions for 

 the size of the test ; aperture narrow, on the inner border of the 

 ventral side of the last-formed chamber. 



Tertiary and Recent. 



Genus BAGGINA Cushman, 1926 



Plate 40, figure 15; plate 41, figure 15 

 Genoholotype, Baggina calif ornica Cushman 



Baggina Cushman, Contr. Cushman Lab. Foram, Res., vol. 2, 192G, p. 63. 

 Pulvimdina (part) of authors. 



Test subglobular, trochoid ; chambers relatively few, dorsal 

 side with the chambers in the adult more or less involute, the 



