313 



Aperture rounded-ovate, slightly flaring at the base, proportionately large 

 for the size of the shell. Parietal lip as a very thin deposit on body whorl, 

 usually margined by a fine hair-like line. Palatal lip usually labiate a little 

 below edge, rather thin. Columella whitish, not twisted, inclined slightly to 

 the left, terminating more or less gradually in the body whorl. Sutures only 

 slightly impressed. Sculpture of numerous, more or less regularly spaced 

 fine growth lines. Varicose bands yellowish externally, deep chestnut when 

 viewed from within the aperture. Cross striae usually present but very fine, 

 lacking in all juvenile specimens. 







Measurements. 







Length 



Width 



Aj). Length 



Av. Width 





Type 



13.5 



8. 



10. 



4.5 mm. 



U. of M. 

 32663 



Holotype 



13.5 



8.5 



9.5 



4.5 



Remington 

 1668 



Paratype 



13. 



8. 



9. 



4.5 



11 



" 



12.5 



9. 



10. 



5. 



a 



a 



13. 



8. 



9. 



4.5 



U. of M. 

 32664 



a 



13. 



8. 



9. 



4. 



(( 



'' 



12.5 



8. 



9. 



4. 



(I 



u 



13.5 



8. 



9.5 



4.5 



M. C. Z. 

 50964 



a 



13. 



8.5 



9.5 



4.5 



(I 



a 



12.5 



8. 



9.5 



4.5 



It 



" 



13. 



8.5 



10. 



4.5 



Walker 

 82647 



" 



12. 



8. 



9. 



4.5 



" 



a 



12.5 



8. 



9.5 



4.5 



A. N. S. P. 



<< 



12. 



7.5 



8.5 



4.5 



" 



a 



12. 



7.5 



8.5 



4. 



U. S. N. M. 

 362881 



" 



11.5 



7.5 



8.5 



4. 



Holotype. — Museum of Zoology, University of Michigan, no. 32663; col- 

 lected at Round Spring, 12 miles north of Eminence, Shannon Co., Missouri, 

 by P. S. Remington, June 7, 1925. 



Remarks. — A medium sized species, not readily associated 

 with any other form. Its obtuse spire would seem to place it 

 nearest to P. microstoma Hald. 



