The house is officially supposed to contain every single species of Latvian reptile and amphibian, but my impression is that this is usually not the case - during my visit, a few species were behind the scenes due to exhibit renovations or breeding, and a few were simply absent from the zoo because they were sourcing new individuals.
I won't be uploading photos of every single exhibit in here as not all of them turned out good, so you're only getting a selection.