PLATE XXXI. 



[Part IV.— September 1883.] 



Fig;. 1. OxYTEs CYCLOPLAX, Bs., iiat. size, juv. \V. Bhutan Hills. 



2. Ditto : auimal, shell removed, viewed from rli^ht side, x 



3. Ditto : extremity of foot, viewed from behind, x 4. 

 k Ditto : maiitle-edge, as .seen from left side, x 4. 



5. Ditto : jaw, X 12. 



6. Ditto : radula, centre teeth of, x 1 80. 



6 a. Ditto: last median and first lateral teeth, x 180. 



6 /j. Ditto : outermost laterals, x 1 80. 



7 Ditto : generative organs, x 4. 



8 8fl. 8 6. OxYTEs CYCLOPLAX, Bs., adult shell, uat. size. Da 



