EXPLANATION OF PLATE XXI. 



Fig. I. Dlplommntina macgilUvrayi, Vfr., magni&ed. 



2. Diflommathia cajiiUncea, Pfr., magnified. 



3. Jaw of Naniiia sophice, Gask., var. conica, Bra^., magnified. 



4. Jaw of Placostyhis hivaricosus. Gask., magnified. 



5. Microcystina catletti, Braz., magnified. 



6. Jaw of Patula whiteleggei, Braz., magnified. 



7. Jaw of Nanina hcnvinsxdcp, Cox, magnified. 



8. Realm exquisita, Pfr., magnified. 



9. Simpulojisis (?) mastei'si, Brazier, magnified. 



[ReproiUiced from drawings by C. Hedley.] 



