25 



83 tectiformis roof-shaped 



84 Madeirensis little brown band- 



ed 



85 bicarinata double-keeled 



Madeira. 



NERITA. 



1 duplicata 



2 patula 



3 plumbea 



4 ornata 



5 Australis 



NERITE. 



doubled Br.M. 



wide snail-shaped 



lead-coloured 



tooth-lipped 



Cap 



6 crepidularia Slipper 



7 intricata mottled D.I. 



8 Oweniana shapeless 



9 cariosa angular-mouthed Gray Cab. 



10 Caffra Negro 



11 Smithii Smith's 



12 spinosa spiny 



S. America. 



New Holland. 



Britain, &c. 

 Africa. 



