Animal Morphology -- See Morphology (Animals) Here are entered works on the principles of structure in the animal kingdom. General comparative works on animal anatomy and morphology are entered under Anatomy, Comparative. --subdivision Morphology under individual animals and groups of animals, e.g. Fishes--Morphology; and subdivision Spermatozoa--Morphology under individual animals and groups of animals, e.g. Cattle--Spermatozoa--Morphology; Fishes--Spermatozoa--Morphology