We've discussed this before. Here is one photo of conjoined diamondback terrapins that appeared in monochrome in the Herpetological Review Vol. 40 No. 2, 2009 (authors Rulison, McGuire, and Muldoon). If you want this in better better resolution, email me. See more at http://www.dtwg.org/
Thanks to Eric Rulison.
Bill




