EXPLANATION OF PLATE XXII. 
Fig. 1. Radula of Patula whiteleggei , Brazier, magnified. 
„ 2. Padula of Nanina hilli , Cox, magnified. 
,, 3. Padula of Placostylus bivaricosus, Gaskoin, magnified. 
,, 4. Jaw of Parmella etheridgei , Brazier, magnified. 
„ 5. Genitalia of Nanina howinsulce, Cox. 
,, 6 Jaw of Nanina hilli, Cox, magnified. 
„ 7. Padula of N. sophice var. conica, Brazier, magnified. 
,, 8. Padula of N. howinsulce, Cox, magnified. 
[Reproduced from drawings by C. Hedley.] 
