EXPLANATION OF PLATE II. 



Figure 5. Cerithium magnum, Nobis. 



C. testa turrita, maxiniri, ponderosu, cinereo-fuscescente; ar«- 

 fraclibus infra suluras bicinctis et tuberculis coronatis ; colu- 

 mella sub-biplicata ; apcrtuni. alba. 



IIab. ? 



This is the largest recent Cerithium that I have seen ; 

 it measures nearly five inches, and is marked with lon- 

 gitudinal irregular brownish lines or spots. 



jPi^areG.6. Ranella ? 



Hab. ? 



I have been informed that this curious shell has been 

 already described ; if so, it will be a pleasure to learn 

 by whom, from some of my friends. 



