PLATE XXXIX. 



[Part lY .— September 1883.] 



Fig. 1. DuRGELLA MiNUTAj G.-A. : from life, nat. size. Dafia Hills. 



2. Ditto : view of right side, showing the shell-lobes, x 4. 

 2 a. Ditto : left side, ditto, x 4. 



3. Ditto: shell, x 4. 

 3a. Ditto: ditto, x 2-4. 



4. Ditto : jaw, x 20. 



5. Ditto : central tooth of radula and adjacent teeth, x about 1250. 

 5 a. Ditto : laterals near margin. 



6. Generative organs, x 7. 



7. 7 a. DuRGELLA KHASiANA, G.-A., from life, nat. size. West Khasi Hills 



7 b. Ditto, X 2-4. 



8. Ditto : central teeth of radula, very much enlarged. 



8 a. Ditto : ditto, two rows, x 340. 



8 b. Ditto : the outermost laterals, very much enlarged. 



