546 STUDIES ON AUSTRALIAN MOLLUSCA, IX. 



EXPLANATION OF PLATES XXXL-XXXIIL 



Plate XX xi. 



Figs. 1, 2. — Montacuta semiradiata Tate; hinge and valve. 

 Figs. 3, 4. — NeoUpton rostellatum Tate; hinge and valve. 

 Figs. 5, 6. — Oondylocardia ovata Hedley; hinge and valve. 

 Figs. 7, S. — Gyamiomactra problematica Bernard; hinge and valve. 

 Figs. 9, 10. — Cyamiomactra mactroides Tate and May; hinge and valve. 

 Figs. 11, 12, 13. — Gyamiomactra communis Hedley; hinge and valve, and 

 exterior and interior. 



Plate xxxii. 



Figs. 14, 15, 16. — Philohrya parallelogramma Hedley; young and adult 



valve, and prodissoconch. 

 Fig. 17. — Lima7xa angustifrons T&te {jjartim); hinge. 

 Figs. 18, 19, 20, 21. — Joannisiella sphrericida Deshayes; hinge and valve; 



full and profile. 

 Figs. 22, 23. — Bornia kpida Hedley; valve; full and profile. 

 Fig. 24. — Bissoa emblematica Hedley. 

 Fig. 25. — Rissoa piUvillus Hedley. 

 Fig. 26. — Mitromorpha pallidvla Hedley. 

 Figs. 27, 28, 29. — A'isim,i7iea tasmanica Ten. Woods; shell and operculum; 



exterior and interior. 



Plate xxxiii. 

 Fig. 30. — Gorssidida zonata A. Adams. 

 Figs. 31, 32. — Purpura succincta Marty n; cluster of ova and magnified 



single capsule. 

 Figs. 33, 34 — Tethys norfolkensis Sowerby; from the side and from above. 

 Fig. 35. — Diala translucida Hedley. 

 Fig. 36. — Diala monile A. Adams. 



Figs. 37, ^^.—Emargintda dilecta A. Adams; full and profile. 

 Figs. 39, 40. — Eidimella anabathron Hedley; shell and apex (magnified). 

 Fig. 41. — Odostomia opaca Hedley. 

 Fig. 42. — ActcEon roseus Hedley. 

 Fig. 43. — Leiostraca inusta Hedley. 



