442 The Molluscan Family Plauorbidae 



PLATE 103 



Shells of Planorbidae 



1,2. Helisoma duryi soninole Pilsbry. Everglades, Florida. B2962. 



3-5,8,9. Helisoma duryi scminole Pilsbry. Lake Eustis, Lake Co., Florida. Paratypes. 



B2960. 

 6,7. Helisoma duryi semiiiole Pilsbry. Lake Eustis, Lake Co., Florida. U.L, Z32368. 

 10, 11. Helisoma duryi seminole Pilsbry. Okechobee Lake, near More Haven, Florida. 



M.C.Z., 43311. 



12. Helisoma duryi seminole Pilsbry. Lake Apopka, Florida. M.C.Z., 71599. 



13. Helisoma duryi seminole Pilsbry. Lake Apopka, Florida. M.C.Z., 71598. 

 14-18. Helisoma duryi semiiiole Pilsbry. Survey, Lee Co., Florida. M.C.Z., 68236. 

 19. Helisoma duryi seminole Pilsbry. Sumter Co., Florida. U.L, Z32364. 



20-30. Helisoma duryi (Wetherby). Near West Palm Beach, Florida. M.C.Z., 82856. 

 31. Helisoma duryi (Wetherby). Miami, Florida. L'.S.N.M.. 153412. 



These figures show the great variation in form of spire and shape of 

 shell of the dnryi complex, especially the form seminole. 



All figures are enlarged about P/i; diameters 



