Advanced Text-book of Zoology for Junior Students

abdomen Actinozoa alimentary canal animal Annelida antennæ aperture appendages auricle beak birds bivalve blood body body-cavity bones bony branchiæ buds calcareous called cavity chambers characterised chitine cilia cloaca cœnosarc composed comprising consists contractile coral Crustacea destitute developed digestive disc distinct division dorsal Echinodermata external extinct extremely feet filaments fins fishes fluid Foraminifera fore-limbs furnished GEOLOGY gills gullet head heart horny Hydrozoa incisors Infusoria inhabit insects integument intestine jointed known Lancelet legs limbs living locomotion lower jaw lungs Mammals maxillæ Medusa membranous Mollusca mouth nervous system opens organs pair placed plates polypes polypite possess present produced Protozoa pseudopodia reproductive Reptiles respiration respiratory rudimentary sarcode Scolecida segments shell side single skeleton skin sometimes species spines sponges stomach structure Sub-class sub-kingdom surface swimming tail teeth tentacles thorax toes tube usually ventral ventricle vertebral column Vertebrata Vertebrates whilst wings Zoantharia zoöids