20 PROCEEDINGS OF THE ACADEMY OF [1896. 



Fig. 12. Polygyra materraontana n. sp., seen from below. • 



Fig. 13. Polygyra latispira n. sp., anterior view. 



Fig. 14. Polygyra latispira u. sp., seen from below. 



Fig. 15. Polygyra latispira n. sp., seen from above. 



Fig. 16. Polygyra latispira n. sp., aperture, the plane of peristome 

 at a right angle to line of vision. 



