xu ERRATUM 



confusion. A review of the species is urgently needed. To this end I am accumulating 

 material, and I shall be very grateful for any representative specimens from different 

 parts of India, Ceylon, Burma, and the Persian Gulf that anyone in a position to help 

 may be kind enough to send. Not less than half a dozen shells should be sent from 

 each locality and these should comprise as great a variety of form as possible. The 

 typical or most common form assumed in each locality should be distinctively indicated , 

 wherever possible. 



J. HORNELL. 



