510 The Molluscan Family Plauorbidae 



PLATE 137 



Shells of Planorbidae 



1-13. Taphhis andecolus (Orb.). Duli. Lake Titicaca, Peru. U.S.X.M., 251596. 



14,15. Taphius pronus (Martens). From Liitz. U.S.X.M., 535957. 



16.17; 19-21. Taphius proiius (Martens). Penninsula de Cobrera, Lake Valencia, 



Venezuela. M.C.Z., 111649. 

 18,22-24:. Taphius pronus (Martens). (Fossil, 110 ft.). Lake Valencia, Venezuela. 



B3382. 

 25-27. Taphius montanus (Orb.). Duli, Lake Titicaca, Peru. C. Briies. L'.S.X.M., 



271598. 

 28. Australorbis inimunis (Lutz). Immature. Rio de Janeiro, Brazil. M.C.Z., 74578. 

 29,30. Australorbis immunis (Lutz). Rio de Janeiro, Brazil. M.C.Z., 74578. 

 31-34. Australorbis immunis (Lutz). (From Lutz) Rio de Janeiro, Brazil. U.S.X.M., 



535953. 

 35,36. Australorbis guadcloupensis (Sowb.). Guadeloupe. Salle Coll. L'.S.X.M., 151238. 



