FRESH WATER MUSSEL (ANODONTA CYNEA). 



PLATE XVL 



Fj^. I, a Sid^y view leA manlh h*be Tanmtd 



b Dorsal \^^~p>-^u^^yrltrtTniaj^opc^ Jt h^art ^rne^^ia/^ 



B^ffiim. pa^siTi^ thjX' heart 



Anna 



y^r^ 



g.4-. Audi tory Ofyan ofC^rdaa 



0^-'"^ .Si/^' 



WIlAIC Johuun BdUbur^h b London 



