498 The Molluscan Family Planorbidae 



PLATE 131 



Shells of Planorbidae 



1^. Tropicorbis isthmicus (Pilsbiy). Panama City, Panama. Type locality. U.M., 



88180. 

 5-7. Tropicorbis isthmicus (Pilsbry). Miraflores Lake, Panama. U.M.. 88181. 

 8-10. Tropicorbis decipiens (C. B. Adams). Rockport, Jamaica. B3966. 

 11. Tropicorbis decipiens (C. B. Adams). Puerto Rico. LT.L, Z40460. 

 12-14. Tropicorbis chilensis (Clessin). Valparaiso, Chile. M.C.Z., 74655. 

 15-24. Tropicorbis obstructus donbilli (Tri.stram). Dr\' pool in Tampico, Mexico. 



B1189. 

 25,26. Tropicorbis obstructus donbilli (Tristram). Brownsville, Texas. B127. 

 27-31. Taphius andecolus montanus (Orbigny). Tanja (Oroya), Peru. M.C.Z., 36702. 

 32-35. Taphius andecolus (Orbigny). Puoa, Peru. U.I., Z40575. 

 36-40. Taphius subpronus (von Martens). Terrialba, Costa Rica. U.S.N.M., 162827. 



Figures 1 to 35 are enlarged about two diameters; figs. 36 to 40, four diameters. 



