NO. 1 CUSHMAN, MCCULLOCH : ARENACEOUS FORAMINIFERA 87 



EXPLANATION OF PLATE 12 



Figs. 



1. Trochammina <vesicular'is Goes. X 90. a, dorsal view; b, 

 ventral view ; c, peripheral view. 



2. Trochammina rotaliform'ts J. Wright. X 50. a, dorsal 

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



3. Trochammina carinata Cushman and McCulloch, new 

 species. X 70. a, dorsal view; b, ventral view; c, periph- 

 eral view. 



4. Trochammina squamiformis Cushman and McCulloch, new 

 species. X 90. a, dorsal view ; b, ventral view ; c, pe- 

 ripheral view. 



5-10. Nouria polymorphinoides Heron-Allen and Earland. 5-7, 

 X 45. 8, 10, X 40. 9, X 25. a, a, front views; b, b, aper- 

 tural views. 



11-13. Nouria harrisii Heron-Allen and Earland. X 70. a, a, a, 

 front views; b, b, b, apertural views. 



14, 15. Placopsilina bradyi Cushman and McCulloch, new species. 

 14, X 25. Holotype. Attached to shell fragment. 15, X 30. 

 Attached to echinoid spine. 



