Warning: not for the squeamish.
Conjoined piglets and two-faced kittens! Oooo-eerrr!
In the 19th century, bodies (both human and animal) were hard to come by, so medical and veterinary schools abandoned many dissections and taught their students using remarkably odd objects like waxwork embryos and exploded skulls as well as preserved specimens like this octopus.

The Guardian has a gallery of more interesting examples at www.theguardian.com/artanddesign/gallery/2015/jul/09/victorian-oddities-two-faced-kittens-conjoined-piglets-in-pictures
Enjoy your lunch!