Squid mandibles from the stomachs of sperm whales (physeter catodon l.) captured in the cook strait region of New Zealand

Summary The lower mandibles of squid in the stomachs of two sperm whales examined at the Tory Channel whaling station in 1963–4 were separated into 11 types according to a system of grouping devised by the authors and based on a key drawn up by M. R. Clarke.