Zoology

abdomen adult allied animals antennæ apes appendages arms Ascidians birds body body-cavity bones Brachiopods brain breeding burrows called canal carapace Carnivora cavity cells ciliated claws coast color common coral Crustacea developed digestive dorsal eggs embryo enlarged eyes feet female fins fish flabellum foot fore four ganglia Garpikes gastrula gills glands gorilla habits hatched head heart hind hollow horny inches incisors inhabits insects intestine jaws labrum larger larva larvæ legs length limbs liver lives lobes Lütken's Zoology male mammals maxillæ metamorphosis metres mollusks monkeys mouth muscles nearly nerves nervous system nest oesophagus Order organs pairs palpus pectoral fins pharynx polyps pupa reefs represented segments shell side skin skull slender snakes species spiracles sponge star-fish stomach swimming tadpoles tail teeth tentacles thick thorax toad toes trees Ungulates upper usually ventral vertebrates whales wings winter worms young Zoology