PLATE XX. 
Eurydesma cordatum, var. sacculum, Dana, 
Left valve of a much ventrally produced example, partly testiferous, the anterior margin 
nearly vertical. 
Eurydesma cordatum, Morris. 
Umbonal region and articulus of a left testiferous valve displaying a portion of the 
re.silifer, and below it Freeh’s smooth space, bearing a row of minute muscular 
impressions oi' pits ; on the right, beneath the umbo, is visible the cardinal fold, 
and again below it the inflection for the reception of that of the right valve. 
A more directly interior view of Fig. 2, with the visceral retractor scars shown in addition 
to the features of Fig. 2. 
Right valve, more or less decorticated. 
A similar specimen to Fig. 2 (see PI. XXVT, fig. 4). 
Eurydesma hobartense, Johnston. 
Interior of a portion of a testiferous left valve (.see PI. XXII, fig. 2, and PI. XXIII, fig. 5) 
displaying the long, slender resilifer, cardinal fold, inflection for the reception of 
that of the right valve, and the retractor scars. 
Localities. 
Fig. 
1. 
Allandale, near 
West Maitland. 
Figs. 
2, 3. 
Harper’s Hill, 
Fig. 
4. 
>> 
Fig. 
5. 
Allandale. 
>> 
Fig. 
6. 
Maria Island, Tasmania. 
