100 STUDIES ON AUSTRALIAN MOLLUSCA. 



Fig. 6. — Menon anceps, Hedley, viewed in profile from the base to show 



the varix. 

 Fig. 7. — Menon anceps, Hedley; apex. 

 Fig. 8. —Sirius badius, Tenison-Woods. 

 Fig. 9. — Sella attenuata, Hedley. 

 Fig. 9a. — Sella attenuata, Hedley ; apex. 

 Fig. 10. — Covthouyia aculeata, Hedley. 

 Fig. 11. — Fissuridea lineata, Sowerby; animal. 

 Fig. 12. — Fossariis sydneyensis, Hedley. 

 Figs. 13-15. — Teinostoma orbitum, Hedley; in different aspects. 



Fig. 1 1 slightly reduced, the rest enlarged in various proportions. 



Plate iv. 



Fig. 1. — Notarchus glaucus, Cheeseman ; the animal from life ; reduced 

 by one-third. 



