Plate 73 
This plate from Proceedings of the United States National Museum. 
F IGURE p AGE 
1. Dias to ma fastigiata Carpenter . 10 
Fossil. 
2. Dias to ma oldroydac Bartsch . 9 
3. Diastoma stcanisi Bartsch . 10 
4. Bittium quadrifilatmn Carpenter . 24 
5. Diastoma chrysalloidca Bartsch .Not in text 
Gulf of California. 
