6^1 



/? elongatum Baud. 



y malmi Cless. 

 P. glohidare Cless. 

 P. supinum Schm. 

 P. hensloivanum Shepp. sp. (Tellina.) 



^ suecicum Cless. 

 P. pulcheUum Jen. 

 P. pallidum Jeffr. 

 P. sclioltzi Cless. 



/? lapponicum Cless. 

 P. suhfruncatuni Malm. 



/? turgidum Cless. 

 P. mUium Held. (P. gassiesianum Dup., ar- 

 caeforme Malm.) 



/? uuioides Westerl. 

 P. fossarimim. Cless. 



/? acuminatum Cless. 

 P. ohinsale Pfr. 



[3 magnificum Cless. 



y personatum Malm. 



å fragile Cless. 



£ solidum Cless. 

 P. pusillum Gmel. sp. (Tellina.) 

 P. nitidum Jen. 

 P. parvidum Cless. 



Fam. Unionidse. 

 Dnio Eetzius. 



Unio crassus Retz. 

 a typicus. 



b. acutus Rssm. 



c. maximus Kob. 



d. rubens Mke. 



e. subcurvaius. 

 /i? äter Nilss. 

 y batavus Lam. ? 



b. riparius C. Pfr., Rssm. 



c. rivularis Rssm. 



