PLATE XXVI. 
Meleagrina iiiargaritifera, Linn., vai'. Cumiiigii, Reeve. 
Fig. 1. Portion of the interior of a right valve, showing the hinge-plate, resilifer, b_yssal sinus, 
adduct or impression and visceral scars. 
Fig. la. Dorsal portion of a left valve, exhibiting the hinge-plate, resilifer, and by.ssal .sinus. 
Meleagrina margaritifera, Linn., var. typica, Jamieson. 
Fig. 2. Anterior view of oppo.sed valves, displaying the dorsal gajie, byssal sinus, and byssal 
notch. 
Fig. 3. Dorsal view of the apposed valves, with the dorsal gape and byssal notch. 
Eurydesma cordatum, Morris. 
Fig. -1. Portion of a left valve, showing the hinge-plate, resilifer, car linal fold, and Z-like line of 
visceral muscle scars (see PI. XX, fig. 5.) 
Locality. 
Fig. 4. Allandale, near West Maitland. 
