650 bartsch: Philippine; landsheivLS 



Key to the subgenera of Platy raphe 



Last opercular turn covered with a sohd fused deposit. 



Platyraphina new subgenus 

 Type Platyraphe (Platyraphina) caianduanensis Bartsch 

 Last opercular turn not covered with a sohd fused deposit. 



Last opercular turn provided with obliquely placed imbricating 



scales Platyraphida new subgenus 



Type Platyraphe {Platyraphida) anthopoma Mollendorff 

 Last opercular turn not provided with obliquely placed 

 imbricating scales. 



Operculum with the inner edge of the whorls upturned 

 to form a thickened lamella. . . .Platyraphe Mollendorff 

 Type Platyraphe {Platyraphe) coptoloma Mollendorff 

 Operculum with the inner edge of the whorls not up- 

 turned to form a thickened lamella 



Platyraphella new subgenus 



Type Platyraphe {Platyraphella) malihagoana Bartsch 



Key to the species and subspecies of the genus Platyraphe 



Last opercular turn covered with a solid fused deposit 



PLATYRAPHINA 



Spiral sculpture present on last turn. 



Greater diameter more than 17 mm catanduanensis 



Greater diameter less than 9 mm calayanensis 



Spiral sculpture absent on last turn mamillaia 



Last opercular turn not covered with a solid fused deposit 



Last opercular turn provided with obliquely placed imbricating 



scales PLATYRAPHIDA 



Greater diameter more than 14 mm. 



Spire depressed anthoponia 



Spire elevated media 



Greater diameter less than 14 mm. 



Last nuclear turn with strong axial riblets minor 



Last nuclear turn with feeble axial riblets montalhana 



Last opercular turn not provided with obliquely placed imbricat- 

 ing scales. 

 Operculum with the inner edge of the whorls upturned to form 



a thickened lamella PLATYRAPHE 



Last whorl disjunct at the aperture in adult shells. 

 Spiral lirations strongly developed on the last whorl. 



Peristome decidedly expanded coptoloma 



Peristome not expanded. 



Greater diameter more than 6 mm. 

 Strong spiral lirations at the end of the second 

 whorl 8 princessana 



