Last mention of Aunt Harriet - she's said to be in shock over Bruce and Dick's kidnapping.
The four animals Lotus mentions, the musk deer, civet cat, beaver and muskrat, all had scent glands whose essences were (and are) part of crafting high end fragrances. Although modern synthetic replicas of musk are now more commonly used.
Batman references the Lavender Mob, a reference to the film "The Lavender Hill Mob." A Canadian band in the late 1970's took the same name.
The zoo director is addressed as "Mr. Buck," a reference to famous "Bring 'em back alive" Hunter Frank Buck.
Ambergris is a real product, just as described in this episode. It was highly prized by perfumers for generations. Synthetic based fragrance derivatives were just starting to be mainstream at the time of this episode. Today (2021) they are more common.