I haven't been to the museum myself, but I did go at the zoo once to a presentation by someone (who happens to be a good friend) who has done a lot of research on the zoo's history, and contributed to the new history book. The lions were talked about in that presentation, and specifically the cubs that were born. RWPZ imported a breeding pair of lions (since this was the days everything was wild-caught), and it turns out the pair was brother and sister. Many of the cubs to be born suffered from lots of genetic defects and the majority did not survive very long. Those other four species I was not familiar with as being formerly held species, very interesting, especially the sootey mangabey, as that's a species either not present or extremely rare in US Zoos nowadays.