PLATE XXIV. 
Eurydesma cordatum, var. sacculum, Dana. 
Internal cast of the united valves displaying the characteristic ventricosity of the valves, 
the cardinal margins, and the visceral retractor scars. 
Right valve of Fig. 1. 
Eurydesma hobartense, Johnston. 
United testiferous valves, the left umbo projecting above that of the right, and a further 
inequality is shown by the rapid decrease in convexity of the left valve towards the 
ventral border. 
Localities. 
Figs. 1, 2. Allandale, near West Maitland. 
Fig. 3. Maria Island, Tasmania. 
