Quality

 To list we used HMS-ISGS grading. A plus (+) after a grading means that it is in between that grade and the next grade up.

 A plus-plus (++) after a grading means that it could possibly be the next grade up.

 However, there is an exception. We only use the GEM grade for Cypraeidae , Marginellidae , Olividae and Ovulidae .

 In other families, we use F++, which means that the really GEM shells are also included in this grading.

 The size indicated for each item is the greatest measurable dimension of the shell in any direction, unless otherwise specified.

 Data Slips 

 Data slips are included with each shell with as complete data as possible.

 Others

 All shells are live taken unless otherwise specified