22 BOOK OF SPECIES. 



There are five whorls, of which the body-whorl 

 is almost twice as large as the spire; aperture 

 white; diam. IJ. W. 34. 127. 



H. MELANOTRAGUS. Differs from the last 

 only in its apex being yellowish, and columella 

 and lip black. E. 462. 4. 



H. PELLis-SERPENTis. UmbiUcatcd, sub- 

 carinated, convex, orbicular, yellowish white, 

 with zones of reddish-brown and white flames ; 

 beneath, several series of spots of a like colour ; 

 spire extremely obtuse ; margin of outer lip white 

 and reflected; diam. Ig ; the surface shagreened. 

 W. 33. 39. 



H. LACTEA. Orbicular convex, imperforate, 

 greyish, banded with brown or red, and marked 

 all over with minute milky dots; spire retuse; 

 mouth black ; outer lip expanded, and its margin 

 reflected; diam. li. W. 34. 128. 



H. zoNARiA. Umbilicated, orbicular - de- 

 pressed, smooth, whitish, banded with brown, and 

 sprinkled with red spots ; spire flattened ; outer 

 lip expanded ; its margin white and reflected ; 

 diam. li. W. 34. 94. 



H. ciTRiNA. Orbicular-convex, sub-umbili- 

 cated, smooth, diaphanous and shining, generally 

 pale yellowish or chestnut; last whorl girded 

 with white or black ; outer lip sharp ; spire ob- 

 tuse; diam. 1^. W. 33. 81. 



