PRocEEniNGS Rochester Academy of Science, Vol. 2. 



Plate 9. 

 Revision of the Genus Magilus, &c. 



1. Magilus antiquus, Lam. Adult form with tube. 



2. " antiquus, Lam. Juvenile. 



.3. " antiquus, Lam. Juvenile. A more rounded form 



than number 2. 



4. Leptoconchus Cumingii, Desh. A depressed form. 



5. Magilus antiquus. Lam, var. Rlippellii, Desh. 



6. Leptoconchus Cumingii, Desh. Typical form. 



7. Leptoconchus Maillardi, Desh. 



ALL THE FIGURES ARE NATURAL SIZE. 



