438 The Molluscan Family Planorhidae 



PLATE 101 



Shells of Planorbidae 



1. Helisoma jovealc (Menke). Jamaica. U.S.N.M., 74762. 



2. Helisoma jovealc (Menke). Jamaica. U.S.N.M., 90479. 



3,4,6. Helisoma foveale (Menke). Kingston, Jamaica. U.S.N.M., 454058. 



5. Helisoma foveale (Menke). Kingston, Jamaica. U.S.N. M., 74762. 



7. Helisoma magnificum (Pilsbry). Young, bom in capti\-ity. Parent from type 



locality. U.S.N.M. 

 8,9. Helisoma costaricense (Preston). Catalina, Guanacaste, Costa Rica. Cotype. 



B2132. 

 10. Helisoma costaricense (Preston). Catalina, Guanacaste, Costa Rica. Figured type. 



U.S.N.M., 202522. 

 11.12. Helisoma anceps idahoense F. C. Baker. Foot of Elbow or Lindbergh Lake, 



Mission Mts., Montana. M.C.Z. 



13. Helisoma subcremttum variety? Utah Lake, Utah. U.S.N.M., 29332. 



14. Helisoma suhcrcnatum. (Cpr.). Oregon. From Nuttall in Lea Coll. U.S.N.M., 



120986. 



15. Helisoma caribacum (Orb.). Cuba. To show rounded inner whorls. U.M., 83491. X6. 



16. Helisoma teniic applanatum (von Martens). To show flat inner whorls. U.S.N.M., 



10538. 



All figures, excepting 15 and 16, are enlarged about U/2 diameters 



