PLATE XXI. 



Fig. Page. 



1. Sipho curtus (,'\ef^rejs),y?ir.typira. Little Oakley. (Harmer Collection) 178 



2. ditto. Scaldisien, Antwerp. (Harmer Collection) , .178 

 8. Ya,r. solida, noY. Little Oakley. (Harmer Collection) . 179 



4. var. brevicaudata, nov. Little Oakley. (Harmer Collection) . 179 



5. var. longicavdafa, nov. Little Oakley (Harmer Collection) . 179 



6. var. mc^tri'a/a, nov. Little Oakley. (Harmer Collection) . 179 



7. var. Za/rr, nov. Little Oakley. (Harmer Collection) . . 179 



8. var. exilis, nov. Little Oakley. (Harmer Collection) . 179 



