81 



CYPR^EA. 



A. Mucronate, or with a projecting spire. 



(Plate XIV. fig. 1.) 



B. Obtuse, and without manifest spire, (fig. 2.) 



C. Umbilicate. (fig. 3.) 



D. Margined, (fig. 4.) 



Shell univalve, involute, subovate, obtuse, smooth. 

 Aperture effuse at both ends, 1 inear, toothed on both 

 sides, longitudinal. 



The genus is remarkable for the high polish 

 which adorns it in its native state. The only spe- 

 cies of other genera which are likely to be con- 

 founded with it, are one or two Bullae : these, how- 

 ever, have only one lip toothed or slightly plaited. 

 The outer lip is usually thicker, and more incurved 

 in this than in any other genus, resembling more 

 or less the inner one. 



A very remarkable and unprecedented property 



has been ascribed to the Limax inhabiting the Cy- 



prasa; namely, the power of quitting his tenement, 



and elaborating a new one more suited to his ne- 



G 



