Dear Mrs. Avril Bourquin,
By Richard Salisbury
I have recently received on loan an incredible fossil shell which I call the Crystal Snail. It is reportedly from Palau Islands.
The shell appears to be composed of the same material you see in caves? I am not a geologist so dont know for sure what it is. I am also confused by the sculpture on the shell. It does not appear to be an internal cast but appears to be the entire shell preserved? Nor do I know if this is a fresh water snail or a Marine Gastropod? The sculpture is similar to some species of Turben shells yet it could also be a fresh water snail with raised spiral cords. Shell size: width, 25.95 mm, height, 23.58 mm and aperture width, 12.75 mm.
Does anyone have any information
on shells like this collected from Palau? Any ideas as to the identification
of this fossil species? I cant send the shell on loan as I mentioned
it is on loan to me. The best I can do is provide the images herein.
The mystery Crystal snail is sinply the early, coiled part of Magilus antiquus, Fam. Coralliophilidae. This part is at a later stage always filled with the same material of which the non-coiled part of the shell is made. Best regards, ...Henk K. M.