Some specimens, exterior and interior of valves

Licence: 
Creative Commons Licence
Description: 

From Denisia 18

Photographer: R. von Cosel & P. Lozouet © MNHN. Publisher: Allen, Chris.

Creator: 
R. von Cosel & P. Lozouet © MNHN
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith