I did notice that meme; it’s a neat little joke, but if I were cataloguing it, I’d probably place the “Feline Follies” under 590.5, not 99.99, just to keep the taxonomy tidy. As for that 1952 Britannica with the llama illustration, it’s a rare misprint—probably a typesetter error that slipped through the review process. In my little archive I’ve got the original, no llama, so I’ll just note it in the margin and give it a proper place under 300.00 for zoology.