ZOOLOGY OF THE R.I.M.S. INVESTIGATOR. 



Mollusoa, Plate XXII. 



la 



2a 



3a 



Survey of India C 



1, 1«. Natica simulans, Smith, X 2£. 2, 2a. Columbella suavis, Smith, X 12. 



3, 3a. Trophon ( Boreotrophon ) planispina, Smith, X 2. 



;s, Calcutta. ISOy. 



