PLATE IV. 



Fig- 



1. Purpuroidea Moreausia, p. 27, front view. 

 la. back view. 



2. back view, shell of advanced growth, 



larger specimen. 



3. young shell, front view. 

 3. young shell, back view. 



4. cast of the interior. 



5. Purpuroidea glabra, p. 28, front view. 

 5. back view. 



6. young shell, front view. 

 Qa. young shell, back view. 



