Beyond The Duodecimo
Melville also lists "a rabble of uncertain, fugitive half-fabulous whales" of which he knew only by name and not experience. These were the Bottlenose Whale, Junk Whale, Pudding-Headed Whale, Cape Whale, Leading Whale, Cannon Whale, Scragg Whale, Coppered Whale, Elephant Whale, Iceberg Whale, Quog Whale, and Blue Whale. Their lack of description makes it difficult to know exactly which taxonomically correct whales these names might refer, if any. He notes that should any of them be caught and classified they could be easily incorporated into his system.
Read more about this topic: Cetology Of Moby-Dick