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A Manual of Zoology for the Use of Students, Volume 2
Henry Alleyne Nicholson
Visualização integral - 1870
adult alimentary canal allied America amongst animal aperture appear Applied arms attached become belonging birds body bones called canal canines carry cavity characters closely common completely composed comprising condition connected consists constitute contained covered developed distinct distribution divided division entirely existence external extinct extremity eyes fact feet females fishes five foot four furnished genus gills hand head incisors includes insects known lateral legs length less limbs living lower males Mammals means membrane molars mouth nature occur organs Owen pair period placed placenta plates portion possess present produced regarded remains represented reproductive resembling rudimentary segments separate shape shell short showing side single skin sometimes species structure surface tail teeth termed toes true tube typical upper usually ventral Vertebrates whilst whole wings young