Plate 25. 



Fig. 1. Textularia trochus. X 35. a, front view; 6, ventral view; c, dorsal view. 



2. Textularia conica. X 35. a, front view; b, ventral view. 



3. Bigenerina pennatula. X 35. a, front view; b, apertural view. 

 514 



