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



Mollusca, Plate XXIII. 



la 



2 



2a 



4a 



1, la. Nucula (Acila) graimlata, Smith, X 4. 



2, 2a. Dentalium conm-bovis, Smith, X 1^. 



Survey of India Offices, Calcutta, 



3. Dentalium subcurvatum, Smith, x 1^. 



4, 4a. Lepidopleurus andamanicus, Smith, X 5. 



