134 
SPECIFIC 
the hinge, besides lateral teeth ; upper valve with 
a prominent perforated apex. 
Sorn. Mus. Cas. p. 116. vign. 
Specimen very pale cinereous; striated trans- 
versely; strim scarcely perceptible. The annexed 
figure represents the interior of the upper valve 
with the lateral teeth of the hinge. 
Inhabits the Mediterranean Sea. 
Fig. 2. A. Ephijppium. 
Shell suborbicular, rough, undulate, the flatter 
valve perforated. 
Lister Conch. Tab. 204. Fig. 38. 
Specimen white, convex valve purplish, satu- 
rated towards the apex, silvery within and without ; 
translucent, brittle ; rather lamellate. 
Inhabits the Indian and American Ocean. 
Fig. 3. Hinge of A. Sella. 
Fig. 4. Mytilus Frons. 
Shell plaited ; one lip scabrous. 
Born. Mus. Cces. p. 121. vign. Fig. 6, 
Specimen reddish, oval ; the margin on both 
