r 



CONCHOLOGY. 



PLATE XXI. 



VOLUTA PYRUM 

 PEAR VOLUTE. 



Front View. 



Univalve. 



generic character. 



Spiral ; aperture without a beak, and somewhat effuse ; pillar 

 twisted or plaited, generally without lips or perforation. 



**** Fusiform. 



specific character 

 And 



SYNONYMS. 



Shell obovate and slightly tailed with striated whorls on the 

 sjiire : tip produced and glabrous : pillar with three plaits. 



