FAMILY 33. ROTALIIDAE 267 



Genus SPIRILLINA Ehrenberg, 1841 



Plate 39, figures 1, 2 



Genoholotype, Spirillina vivipara Ehrenberg 



Spirillina Ehrenberg, Abhandl. k. Akad. Wiss. Berlin, 1841, p. 422. 

 Operculina (part) Reuss, 1849. 

 Cornuspira (part) Schultze, 1854. 

 Cyclolina Egger, 1857 (not d'Orbigny). 



Test typically free, occasionally attached, planispiral, com- 

 posed of a subglobular or ovoid proloculum and a long undivided 

 tubular second chamber, close coiled in one plane; wall cal- 

 careous, perforate, surface smooth or variously ornamented; 

 aperture formed by the open end of the tube, 



Cambrian to Recent. 



Subfamily 2. Turrispirillininae 



Test simple, consisting of a proloculum and spirally coiled, 

 undivided second chamber, conical in shape. 



Genus TURRISPIRILLINA Cushman, 1927 



Plate 39, fignire 3; plate 41, figure 1 



Genoholotype, Spirillina conoidea Paalzow 



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



p. 73. 

 Spirillina (part) of authors. 



Test composed of a proloculum and elongate, tubular, undivided 

 second chamber in a hollow conical spire, the coils not appre- 

 ciably involute; aperture, a semicircular opening at the 

 periphery. 



Jurassic to Recent. 



Genus CONICOSPIRILLINA Cushman, 1927 



Plate 39, figure 4; plate 41, figure 2 



Genoholotype, Spirillina trochoides Berthelin 



Conico spirillina Cushman, Contr. Cushman Lab. Foram. Res., vol. 3, 



1927, p. 73. 

 Spirillina Berthelin, 1879 (not Ehrenberg). 



Test coHed in a conical spiral chamber completely involute on 

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



