Thanks Dr Petrij!
I would like to extend a big thank you to Dr. Fred Petrij for sending the eGerbil website the photocopies of the original description of Meriones unguiculatus, better known as the Mongolian gerbil. The scientific publication was the result of the first 'yellow rat' specimens that Abbé Armand David had sent back to the museum d'Histoire Naturelle to be identified, and was eventually published in 1867. At the time it was classified as Gerbillus unguiculatus, and it wasn't until 1908 when Oldfield Thomas (The duke of Bedford's Zoological exploration in Eastern Asia IX. List of mammals from the Mongolian plateau) finally referred to it with its modern name, Meriones unguiculatus.
Dr. Petrij is better known for his work as a member of the Gerbil Genetics Group and the co-author of two important scientific publications regarding the Chinchilla medium gene and recessive yellow and fading yellow genes in the Mongolian gerbil.
You can see a copy of this rare publication on the History of the Mongolian gerbil page here