328 The Molluscan Family Planorbidae 



PLATE 46 



Kidneys of Planorbidae 



1. Parapholyx effusa klamathensis F. C Baker. Klamath Lake, Oregon. 



2. P. effusa klamathensis F. C. Baker. Section near middle. 



3. Promenetus exaciious (Say). Winnebago Lake, near Oshkosh, Wisconsin. 



4. Promenetus exacuous (Say). Section near middle. Line is 0.3 mm. long. 



5. Menetus dilatatus (Gould). Unionville, Connecticut. 



6. Menetus dilatatus (Gould). Section near middle. Line is 0.3 mm. long. 



7. Menetus cooperi callioglyptus (Vanatta). Vancouver Island, British Columbia. 



8. M. cooperi callioglyptus (Vanatta). Section near middle. 



9. Planorbis planorbis (Linn.). Near Warsaw, Poland. 

 10. Planorbis planorbis (Linn.). Section near middle. 

 n. Tropicorbis riisei (Dunker). Puerto Rico. 



12. Tropicorbis riisei (Dunker). Section near middle. 



13. Tropicorbis havanensis (Pfeiffer). Section near middle. 



14. Drepanotrema hoffmani F. C. Baker. Lsabela, Puerto Rico. 



15. Drepanotrema hoffmani F. C. Baker. Section at ])oint indicated by arrow. 



16. Drepanotrema lucidum (Pfeiffer). Section near middle. 



17. Hippeutis complanatus (Linn.). Near Warsaw, Poland. 



18. Hippeutis complanatus (Linn.). Section at point indicated by arrow. Line equals 



0.5 mm. in length. 



19. Bathyomphalus contortus (Linn.). Near Warsaw, Poland. 



20. Bathy<>mi>halus contortus (Linn.). Section at jioint indicated by arrow. Line 



equals 0.5 mm. in length. 



Except where otherwise mentioned the line near the figure 

 indicates 1 mm. in length. 



