Cyrtia exporreeta, var. arrecta. 



Fig. 21. Profile view of a specimen. Page 94 



Rhynchonella saffordi. 



Fig. 22-24. Dorsal, front and profile view of a specimen. Page 79 



Fentamerus nucleus. 



Fig. 25-27. Front, profile and dorsal view of a specimen. Page 59 



Fig. 28. An enlargement of a portion of surface of test. 



