MOLLUSCA. 



PLATE <(( L.XXI. 



'Mi Mm 



X: 



Lhissn/ella sulcata. 



Linoula ematina.. 



I)ixeras arietma . 



I) urn is iiriduiii 



Luufiila cmatina . 



Tench navaHs 



Anaiina Tuspidula. 



t'vi-Jus ri'f/if//. 



