THE FRESHWATER MOLLUSCA OF VICTORIA 
139 
Plate IV. 
Fig. 34. Corbicula angasi Prime. Reg. No. 71229. Hamilton, Victoria. 
Fig. 35. Sphaerium tasmanicum (Ten. Woods). Reg. No. 71230. Tarra- 
ville, Victoria. 
Figs. 36, 36a, 36b. Sphaerium problematicum sp. nov. Type. Reg. No. 
71231. External aspect; internal: a left valve; 
b right valve. Murray River, near Merbein, Victoria. 
Fig. 37. Pisidium etheridgii Smith. Reg. No. 71232. Studley Park Reser- 
voir, Melbourne. 
Fig. 38. Hyridella australis (Lamarck). Reg. No. 71233. Diamond 
Creek, Victoria. 
Fig. 39. Hyridella angasi (Reeve). Reg. No. 71234. Murray River, near 
junction of the Darling (Blandowski Collection). 
Fig. 40. Propehyridella nepeanensis (Conrad). Reg. No. 71235. River 
Mitchell, Bairnsdale, Victoria. 
Fig. 41. Propehyridella cultelliformis (Conrad). Reg. No. 71236. Tarra 
River, Victoria. 
Fig. 42. Propehyridella narracanensis Cotton and Gabriel. Type. Reg. 
No. 71237. Thorpdale, Narracan River, Victoria. 
Fig. 43. Protohyridella glenelgensis (Dennant). Type. Reg. No. 58615. 
Roseneath, Glenelg River, Victoria. 
