Interestingly, the hippopotamus has scales that look somewhat fishlike. These can be seen in the enlargement. I obtained this engraving about 1970 from one of those picturesque bookseller's stalls along the Seine in Paris. The booksellers would often remove plates from old books and sell them separately, so I never did see the entire book. These four particular animals were probably chosen to illustrate the diversity of foot structure among quadrupeds.
All tapirs are endangered species.