Plate 16. 



Fig. 1. CijcJammliia cnnrclhita. X 18. (i, side view; h. apertural view. 



2. (.yclain/nitin cnmprrssfi. X IS. ^/. side view; 5. apertural view. 



3. Cyclaiinnina jxnii-l/ociiliitd. X 1''^. « side view; &, apertural view. 



4. Cydammina pusilla. X 18. a. side view; h. apertural view. 



5. Aminos phaeroidina grandis. X 15. 



1.S21.52-20 34 505 



