108 
producing them, and are found in various bivalves and uni- 
valves, either adhering to the shell, or imbedded in the 
fleshy part of the animal. = 5 
TAB. XLVI - e 
MARGARITA SINENSIS.-* 
M. fusea albo-radiata; interne margaritacea fusce 
hmbata; epidermide concentrice elevata processibus 
in lineas subradiantes digestis. 
Habitat in mari Sinensi. 
CHINESE PEARL-SHELL. 
Brown radiated with white ; internally pearly bordered 
with brown; epidermis concentrically elevated, with pro- 
cesses arranged in somewhat radiating lines. 
Inhabits the sea of China, but is rarely found in such 
perfection as that exhibited in the annexed plate. It seems 
to have been confounded with the common pearl-shell. 
a, Shows the excavation for the cartilage, part of which 
is removed. 
