懂中文 Dong Chinese

蜆

xiǎn, xiàn

a variety of bivalves

Evolution

蜆 Seal script Shuowen (~100 AD)

Seal script

Shuowen (~100 AD)
蜆 Clerical script Jin dynasty (266-420 AD)

Clerical script

Jin dynasty (266-420 AD)
Definitions

蚬 (蜆) 

xiàn

a variety of bivalves

蚬 (蜆) 

xiǎn

Cyclina orientalis