I have to go with H. amouretta for Rick's shells.  I've documented this conversation on LTS (http://z14.invisionfree.com/Conchologist_Forum/index.php?showtopic=2894) with Rick's photos (and permission) and added photos of a H. amouretta from the Solomons in my collection.  While there are are some overall shape differences, with my shell more closely resembling forma crassa, I cannot see how Rick's shells can be distinguished as other than a normal, local, regional variation for the species.

marlo 

---- Tom Eichhorst <[log in to unmask]> wrote: 
> I agree with Rick.  While the shells he illustrated may not be H. 
> gracilis, they are certainly unlike any of the H. amouretta I have 
> (another 30 specimens to that 50).
> 
> Tom E.

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