74 A REVISED CENSUS OF THE TASMANIAN FLUVIATILE MOLLUSCA, 



Fig. 5. Physa tasmanica, y ax. B. Ten. Woods, from one 

 of the type series. 



Fig. 6. Physa ciliata, Ten. Woods, from one of the type 



lot. 

 Fig. 7. Physa legrandi, Ten. Woods, from the type. 

 Fig. 8. Physa tasmanica, Ten. Woods, from the type. 

 Fig. 9. Physa tasmanicola, Ten. Woods, from the type. 



Fig. 10. Planorbis atkinsoni, Johnston, from Petterd's 

 specimen, compared with the type series. 



Fig. 11. Planorbis meridional is, Brazier, from Petterd's 

 co-type. 



Fig. 12. Planorbis scottiana, Johnston, from Petterd's 

 specimen compared with the type series. 



Fig. 13, 14. Planorbis tasmanicus, Ten. Woods, from speci- 

 mens compared with the type series. 



Fig. 15, 16. Ancylus tasmanicus, Ten. Woods, from one 

 of the type series. 



Fig. 17. Potamopyrgus brownii, Petterd, from one of the 

 type series. 



Fig. IS. Potamopyrgus dycriana, Petterd, from one of the 

 type series. 



Fig. 19. Potamopyrgus pontvillensis, Ten. Woods (By- 

 thinia), from one of the type series. 



Fig. 20. Potamopyrgus dunrobinensis, Ten. Woods (By- 

 thinia), from one of the type series. 



Fig. 21. Potamopyrgus elongatus, May, from the type. 



Fig. 22. Potamopyrgus marginata, Petterd, from one of 



the type scries. 

 Fig. 23. Bythinia legrandiana, Brazier, from Petterd's 



specimen. 



Fig. 24. Bythinia legrandi, Ten. Woods, from one of the 

 type series. 



Fig. 25. Bythinia unicarinata, Ten. Woods, from one of 



the type series. 

 Fig. 26. BytMnia tasmanica, Ten. Woods, from one of the 



type series. 

 Fig. 27. Potamopyrgus: smithii, Petterd, from one of the 



type series. 

 Fig. 2S. Bythinia dulvertonensis, Ten. Woods, from one 



of the type series. 

 Fig. 29. Potamopyrgus woods/, Petterd, from one of the 



type series. 



