26 AMERICAN JOURNAL 



the shell for nearly an entire volution. I think it entirely proba- 

 ble that Chemnitz's species is from the Andaman Islands, as it 

 is in many respects closely allied to mine. Until we shall re- 

 ceive more evidence on the subject, I think my species ought to 

 stand, the synonymy to be as follows : 



Cyclophorus Leai, Tryon, 1869. 



Oi/clophorus foUaoeus of Reeve and Benson (non Chemnitz), 

 1860-61. 



The pattern of the epi^ rmis was unknown to the English 

 naturalists. 



