Captain F. Marryat's Description of two new SheJh. 339 



Habitat 



Apertura labiis cancellatis, cancellis transversim striatis. 



I found this beautiful little shell among a collection of chiefly 

 West India shells. According to the Linnaean system, it would 

 come under the genus Turbo; but with the advice of Dr. Leach, 

 I have distinguished it as a genus, under the title of Cyclostrema, 

 Helix depressa and serpuloides of Montagu are referable to the 

 same genus. 



vot. XII. 2 Y XIX. De- 



