EXPLANATION OF PLATE XI. 
Fig. 1. Parmella etheridgei, Brazier, x 3| diam. 
„ 2. Shell of ditto, x 5. 
,, 3a. Kadula of ditto, x 8. 
„ 3 b. Bachidian and lateral teeth of radula, x 1000. 
,, 3c. Marginal teeth of radula, x 1000. 
„ 4. Genital system of ditto, x 6. 
common orifice ; p.s., penis-sac; s, spermatophore ; /, flagellum; 
vas deferens ; g.b. } genital bladder ; pr., prostrate ; ov. 9 oviduct. 
