AMERICAN POND SNAILS. 



I 

 1. Pahidina decisa. 2, 3. P. mtertexta. 4. P. coarctaia. 5. P. georf/ima. 6. P. contectoides. 7, 8, P. iiir 

 tegra, 9. P. luhpwpwrea, 10, 11, 12. P. ponderoia. 



