36 



PROCEEDINGS OF THE MALACOLOGICAE SOCIETY. 



Semiplectet neptuna, l'i'r. 



Fig. 12. Portion of mantle zone. 

 „ L3. Genitalia, x 1*4. 

 ,, 13#. Male organ, view of other side, x 1-4. 

 ,, 14. Jaw, x 43, ami central teeth of the radula, x 184. a, 37th to 40th, 



b, 109th to 111th, c, 128th to 130th, and d, the nine outermost 



lateral teeth. 



