534 bartsch: subspecies of leptopoma nitidum 



Shell more than 20 mm. in diameter. . . 2. guimarasensis 

 Shell less than 18 mm. in diameter. 



Umbilicus more than half covered. . 3. darajuayensis 



Umbilicus less than half covered 4. samarensis 



Spiral striations closely spaced on the last whorl. 

 Obsolete peripheral thread present. 



Spiral lirations confined to the nepionic whorls 



5. atropos 

 Spiral lirations not confined to the nepionic whorls. 



Umbilicus more than half covered 6. cebnensis 



Umbilicus less than half covered. . 7. butauananensis 

 Obsolete peripheral thread absent. 



Spiral lirations confined to the nepionic whorls. 



8. basiaoensis 

 Spiral lirations not confined to the nepionic whorls. 

 Shell more than 16.5 mm. in diameter. 

 Umbilicus less than half covered. 



9. vtaculaboensis 

 Umbilicus more than half covered . . 10. leytensis 



Shell less than 15 mm. in diameter 11. nitidum 



Spiral sculpture consisting of weak, feebly incised lines. 



Nepionic whorls brown 12. romblonensis 



Nepionic whorls white. 



Spiral lirations confined to the nepionic whorls. 



Shell more than 19 mm. in diameter 13. panayensis 



Shell less than 14 mm. in diameter 14. anaitis 



Spiral lirations not confined to the nepionic whorls. 



Shell more than 18 mm. in diameter 15. unionensis 



Shell less than 16 mm. in diameter 16. artemisia 



The type locality, measurements, and disposition of the types 

 are shown in table 1. All of the above subspecies excepting 

 number 11, L. n. nitidum Sowerby, are new. 



