Captain F. MannvaTY's Description of two new Shelis. 339 
Habitat - i 
A pertura labiis cancellatis, cancellis transversim striatis. 
I found this beautiful little shell among a collection of chiefi y 
West India shells. ` According to the Linnæan system, it would 
come under the genus Turbo; but with the advice of Dr. Leach, 
] have distinguished it as a genus, under the title of Cyclostrema. 
Helix- depressa and serpuloides of Montagu are referable to the 
same genus. 
VOL. XII. gv XIX. De- 
