AMERICAN JOURNAL OF CONCHOLOGY. Plate 4. 



12. 



Fig. 7. lo spinosa, L(a. 

 " 8. " f/ibbosa, Anth. 

 " 9. " recta, Anth. 



Fig. 10. lo brevis, Anth. 

 " 11. " spirostoma, Anth. 

 " 12. " turrita, Anth. 



