EXPLANATION OF PE-ATE XI. 



Fig. 1. Parmella etheridgei. Brazier, x 3 2 diam. 

 2. Shell of ditto, x 5. 

 3a. Radula of ditto, x 8. 



3fe. Eachidian and lateral teeth of radula, x 1000. 

 3c. Marginal teeth of radula, x 1000. 

 k Genital system of ditto, x G. 



'•.0., riniuniiii di-iticu ; p.s., penis-sac; s, speruiataphore ; _/", flagelluin : 

 I'.iL, vas deferens; g.h., genital bladder; I'r., prostrate; ov., oviduct. 



