468 The Molluscan Family Planorbidae 



PLATE 116 



Shells of Planorbidae 



1,2. Parapholyx effusa (Lea). Sacramento River, California. T.vpe localit\'. Probably 



type lot. U.S.N.M., 121167. 

 3. Parapholyx cffusa (Lea). Sacramento River, California. Type localit,y. U.S.N. M., 



121133. 

 4-6. Parapholyx effusa (Lea). Oregon City, Oregon. U.S.N.M.. 520085. 

 7,8. Parapholyx effusa neritoides (Hemphill). Dalles of the Columbia River, Oregon. 



Type locality. U.S.N.M., 36615. 

 9-11. Parapholyx effusa neritoidcs (Hemphill). Dalles of the Columbia River, Oregon. 



Type locality. U.S.N.M., 37518. 

 12,13. Parapholyx effusa costata (Hemphill). Dalles of the Columbia River, Oregon. 



Smooth form. U.S.N.M., 47519. 

 14. Parapholyx effusa costata (Hemphill). Dalles of the Columbia River, Oregon. 



Smooth form. U.S.N.M., 36617. 

 15-17. Parapholyx effusa diagonalis J. Henderson. Crater Lake, Oregon. Type locality. 



B3926. 

 18. Parapholyx solida (Dall). White Pine, Nevada. Lectotype. U.S.N.M., 56409. 

 19,20. Parapholyx solida (Dall). White Pine, Nevada. Paratypes. U.S.N.M., 56409. 

 21. Parapholyx solida (Dall). White Pine, Nevada. U.S.N.M., 75438. 

 22,25,26. Parapholyx solida (BaW). White Pine, Nevada. U.S.N.M., 24839. 

 23,24. Parapholyx solida (Dall). White Pine, Nevada. 24, slightly costate. U.S.N.M., 



56410. 

 27-30. Parapholyx mailliardi Hanna. Eagle Lake, California. Type locality. U.S.N.M., 



47652. 



All figm'es are enlarged about three diameters 



