40 AMERICAN JOURNAL 



PI. 4, fig. 1. Lymncea Vahlii, from Amaraglik ; L. Vahlii, 

 var. elongata, Moll. MSS. Mbller's drawings. 

 " 2. Lymncea Vahlii, Bk. Kuksuk. 

 " 3. " " from Steenfeld's drawings. 



" 4. " " young, with the animal drawn 



by the same, alive at Copen- 

 hagen. 

 " 5. " " the same ; older specimen. 



" 6. L. Wormshioldii, Beck, young. L. Holbollii, 



Bk., Ind. 

 " 7. L. Pingelii, Moller's drawing. 

 » 8. L. Rolbollii, " « 



" 9. Planorbis aroticus, Bk. 

 " 10. Pisidium Steenbuchii, Moll. 



