268 FORAMINIFERA 



slit on the ventral face of the revolving chamber from the 

 periphery toward the umbilicus. 

 Jurassic. 



Subfamily 3. Discorbisinae 



Test chambered, trochoid, umbilical region generally open, 

 dorsal side with all chambers visible, only those of the last- 

 formed whorl visible from the ventral side; aperture ventral, 

 not extending out to the periphery. 



Genus PATELLINA Williamson, 1858 



Plate 39, figures 6-8; plate 41, figure 3 



Genoholotype, Patellina corrugata Williamson 

 PateU'ma Williamson, Rec. Foram. Gt. Britain, 1858, p. 46. 



Test conical or planoconvex, early whorls undivided, and oc- 



EXPLANATION OF PLATE 39 



rotaliidae 



Fig. 



1, 2. Spirillina vivipara Ehrenberg. Fig. 1, (After type figure). Fig. 2, 

 (After H. B. Brady), x 65. a, side view; b, apertural view. 



3. Turrispirillina conoidea (Paalzow). (After type figure), a, side 



view; b, ventral view. 



4. Coyiico spirillina trochoides (Berthelin). (After type figure), a, 



dorsal view; b, ventral view; c, periprieral view. 



5. Discorbis scalarif ormis Paalzow. (After type figure), a, dorsal 



view; b, ventral view; c, peripheral view. 

 6-8. Patellina corrugata Williamson. (After H. B. Brady). Fig. 6, a, 

 side view; b, dorsal view. X 80. Fig. 7, Ventral view. X 80. 

 Fig. 8 a, side view. X 80. 8 b, dorsal view. X 100. 

 9. Diacorbis rosacea (d'OrbigTiy). X 65. (After H. B. Brady), a, 

 dorsal view'; b, ventral view; c, side view. 



10. Discorbis vesicularis Lamarck. X 20. (From specimen from type 



locality), a, ventral view; b, dorsal view; c, side view. 



11. Latnarckina erinacea (Karrer). (After type figure), a, dorsal 



view; b, ventral view; c, side view. 



12. Vahmlineria calif ornica Cushman. X 40. (After type figure). 



a, dorsal view; b, ventral view; c, side view. 



13. Gyroidina soldanii d'Orbigny. X 30. (After H. B. Brady). a, 



dorsal view; b, ventral view; c, side view. 



14. Rotaliatina mexicana Cushjuan. X 40. (After type figui'e). a, 



dorsal view; b, ventral view; c, side view. 



