EXPLANATION OF PLATE XXI. 
Fig. 1. Diplommatina macgillivrayi, Pfr., magnified. 
,, 2. Diplommatina capillacea , Pfr., magnified. 
,, 3. Jaw of Nanina sophia, Gask., var. conica, Braz., magnified. 
„ 4. Jaw of Placostylus bivaricosus. Gask., magnified. 
„ 5. Microcystis/ catletti , Braz., magnified. 
„ G. Jaw of Patula ivMteleggei y Braz., magnified. 
„ 7. Jaw of Nanina howinsulce, Cox, magnified. 
,, 8. Realia exqwisita , Pfr., magnified. 
„ 9.. Simpulopsis (?) mastersi , Brazier, magnified. 
[Reproduced from drawings by C. Hedley.] 
