370 The MoUuscan Family Planorbidae 



PLATE 67 



Radiilae of Planorbidae 



See remarks on plate 53. Line at lower right of plate indicates 25 microns 

 in length. Line under fig. 6 is also for figs. 1 to 5. 



1. Promcnetus exacuous (Say). Wainvvright Park, Alberta. 



50, center tooth; 1-6, lateral teeth; 9, 10, intermediate teeth; 11-15, marginal 

 teeth. 



2. Promenetus umbilicatcUus (Cockerell). Wainwright Park, Alberta. 



60, center tooth; 1-6, lateral teeth; 9-11, intermediate teeth; 12-15, marginal teeth. 



3. Menetus cooperi caUioglyptus (Vanatta). Vancouver Island, British Columbia. 



55, center tooth; 1-8, lateral teeth; 9, 10, intermediate teeth; 11-15, marginal 

 teeth. 



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



60, center tooth; 1-7, lateral teeth; 8-10, intermediate teeth; 11-14, marginal teeth. 



5. Menetus sampsoni (Ancey). Stanton, Missouri. 



50, center tooth; 1-7, lateral teeth; 8, 10, intermediate teeth; 11-14, marginal 

 teeth. 



6. Anisus spirorbis (Linn.). Near Warsaw, Poland. 



45, center tooth; 1-10, lateral teeth; 11, intermediate tooth; 12-15, marginal teeth. 



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



60, center tooth; 1-9, lateral teeth; 11, intermediate tooth; 14-20, marginal teeth. 



8. Camiifex ponsonbyi E. A. Smith. Klamath Lake, Oregon. 



115, center tooth; 1-6, lateral teeth; 7-10, intermediate teeth; 11-27, marginal 

 teeth. 



